It is advised to put oil on stagnant water to prevent breeding of mosquitoes. This is because

Options

A. oil cuts off oxygen supply, thereby stops the breeding of mosquitoes
B. mosquitoes are repelled by oil
C. mosquitoes are killed by oil
D. mosquitoes get stuck in the layer of oil

Answer

A

Explanation

The thin layer of oil on top of the water prevents mosquitos breeding in two ways:mosquito larvae in the water cannot penetrate the oil flim with their breathing tube, and so drown and die, adult mosquitoes don.t lay eggs on the oiled water.