DDT was sprayed for mosquito control, but only birds and animals were the victims. Why weren't mosquitoes affected?

There wasn't sufficient DDT for all mosquitoes.

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There were too many mosquitoes.

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The mosquitoes developed resistance towards DDT.

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DDT hastened the reproduction of mosquitoes.

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Solution

The correct option is C The mosquitoes developed resistance towards DDT.
DDT is a pesticide that was used against mosquitoes earlier. However, mosquitoes developed resistance against DDT and remained unaffected by the poisonous pesticide. As a result, the spraying of DDT to kill mosquitoes affected birds and animals instead.

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