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Correct option is  (b) three

There is no concept of season in equatorial regions because-

1. The equatorial region lies between 0° to 10° latitudes in both the hemispheres. 

2. The sun is exactly overhead in the equatorial regions throughout the year giving maximum insolation. 

3. Thus, constant high temperatures are experienced throughout the year, which gives rise to heavy convectional precipitation.

4. Days and nights are almost of equal length and thus, the concept of summer and winter as being hot and cold seasons do not exist in these parts.

(d) trees shed leaves during winter

(d) South East Asia

Correct Answer is  (b) windy condition

Correct Answer is  (c) drizzle

Correct Answer is  (a) Siberia

1. This region as the name suggests is located in the western part of the continent in the latitudinal belt of 45° to 65° N and S. 

2. Main countries included in this region are the countries of Western Europe, South Eastern Australia, New Zealand, Western Coastline of USA and Canada, Southern Chile, Southern Alaska. 

3. This region has mild to cool summer; average summer temperature is 20°C. Average winter temperature is 5°C. Winters are quite warm due to warm ocean current passing along the coastline.

4. Due to nearness to sea, there is always high cloud cover and high humidity. Average rainfall is 500 to 2500 mm. Fog, frost and drizzle are common. 

5. Temperate deciduous trees grow, they shed leaves in winter. Coniferous trees grow on mountain slopes, short green grass grows throughout the year. 

6. Fishing, agriculture and animal rearing is the main occupation of the people.

1. Equatorial region is located between 0° to 10° in both the hemisphere, that is on either side of the equator. 
2. The Amazon basin of South America, Congo basin of Africa, East coast of Central America, Malaysia, Indonesia, Papua New Guinea, Madagascar, Philippines are included in this region. 
3. This region has a unique climate. Being located along the equator, sunrays are vertical throughout the year. Therefore, the temperature is constantly high throughout the year, Average 
4. The days and nights are of equal duration. This may be the only region in the world where there is no summer or winter seasons. Throughout the year there is high temperature and heavy rainfall, thus it has hot and wet climate. 
5. This region has heavy rainfall almost daily. The ITCZ (Inter-Tropical Convergence Zone) is an area of low pressure in this region due to high temperature and convectional currents. In ITCZ, North East and South East trade winds converge. They bring warm and humid air in this region. Due to convectional currents, moist air rises up, gets condensed and gives heavy rainfall every day. Rainfall is 2500 to 3000 mm, evenly distributed over the year.
6. Due to hot and wet climate, there is a luxuriant growth of the trees. Therefore, the trees are tall and forest have three layered vegetation. Due to heavy rainfall trees are evergreen. Thus, they are evergreen rainforest and they provide hardwood.
7. Due to dense forest growth, climbing and jumping animals like monkeys, as well as snakes, crocodiles are observed on marshy land. This region has rich biodiversity. 
8. Due to heavy rainfall chemical weathering is more common than physical weathering, fertile elements of soil are washed away. only iron particles remain in the soil. 
9. Tribal people live in this region with the help of hunting of birds and animals and food gathering activity. For example, pygmies in Congo basin of Africa.

(a) Philippines

(a) high humidity

1. In higher latitudes that is near the North pole Tundra climate region is located. It is only on the landmass of Antarctica in the Southern Hemisphere. 

2. The countries bordering Arctic Ocean, that is Northern part of North America, Greenland, Eurasia, Antarctic, Peninsula and islands in the polar region are included in this climatic region. 

3. This region has also unique climate. There is day light continuously for six months and night for six months. 

4. This region has long winters of 10 to 11 months and short summers of 1 to 2 months. 

5. This region is away from the equator, so sunrays are slanting, therefore summer temperature is around 10°C, but winters are severe, winter temperature is -20°C to -30°C. Due to low temperature there is low evaporation.

6. There is no rainfall but there is snowfall. Average snowfall is 300 to 500 mm. 

7. Polar anticyclones, strong winds, snow storms, coastal fog are common

8. Due to low temperature hardly moss, lichen grow. In summer when snow melts some flowering plants grow. 

9. The main source of livelihood of people is hunting of seals, walrus, polar bear for collection of fur and meat, fishing and mining at some places. Main tribe in this region is Inuits.

(c) precipitation exceeds evaporation

Correct Answer is  (a) olives