Read the following lines and answer question on the basis of the same:The presence of dragonflies can reveal changes in the water ecosystems more quickly than studying other animals or plants. In fact, from the nymph to the adult stage, the dragonfly has a significant, positive ecological impact. Dragonfly eggs are laid and hatched in or near water, so their lives impact both water and land ecosystems. Once hatched, dragonfly nymphs can breathe underwater which enables them to eat mosquito larvae, other aquatic insects and worms, and even small aquatic vertebrates like tadpoles and small fish and in the air. Adult dragonflies capture and eat adult mosquitoes. Community wide mosquito control programs that spray insecticides to kill adult mosquitoes also kill dragonflies(i) The approach to biological control includes: a. Import and release of an insect pest to a new area to provide hosts for natural enemies b. Import and release of natural enemies from the native home of an alien insect pest that has invaded a new area c. Preservation of natural enemies (predators & parasitoids) that are already established in an area d. Use of insecticides to reduce alien insect pests to establish new equilibrium position.(ii) Two diseases less likely to occur in a region with plenty of dragonflies are_____a. Yellow fever and amoebic dysentery b. Malaria and Yellow fever c. Anthrax and typhoid d. Cholera and typhoid(iii) Dragonflies indicate positive ecological impact as-a. The presence of dragonflies indicates polluted water. b. Dragonfly nymphs selectively eat mosquito larvae. c. They help to decrease the probability of diseases spread by vectors. d. Dragonfly do not cause any harm to beneficial species.(iv) The most effective stages in the life cycle of dragonfly that eradicate mosquitoes are-a. Larvae and Adult b. Caterpillar and Adult c. Nymph and Adult d. Pupa and Adult(v) Assertion: Releasing dragonflies in areas where there is an outbreak of malarial diseases can be an environment friendly method of control. Reason: Dragon flies are dominant species and will not allow mosquitoes to reproducea. Both assertion and reason are true, and the reason is the correct explanation of the assertion.b. Both assertion and reason are true, but the reason is not the correct explanation of the assertion.c. Assertion is true but reason is false.d. Both assertion and reason are false