Biological factors are responsible for causing disasters.

1.	Biological factors are responsible for causing disasters.
Answer» Solution :Biological disasters ARISE DUE to sudden increase in population of certain kinds of plants (weeds), animals or MICROBES. They can be further classified as: i. Plant related disasters a. Forest fires occur due to natural causessuch as lightning, etc., that set the trees on fire. Humans can also intentionally or unintentionally provide a source of fire to ignite the forest. b. Overgrowth of weeds like common grass, carrot grass and certain common weeds may cause biological disasters. ii. Animal-related disasters. Biiological disasters may result from living organisms that may spread infectious VIRUSES or bacteria, that cause diseases/epidemics like CHOLERA, malaria (spread by infected mosquito), plague (spread by infected rodents) and hepatitis. Disasters may also occur due to bites from poisonous animals or when there is uncontrolled breeding of insects that spread disease, etc.

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