Ecological Indicators 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.
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 reproduce

Options

A. 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

Answer

c

Explanation

Assertion is true but reason is false.