________ are used to kill unwanted insects in fields.
A
Pesticides
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B
Seeds
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C
Fertilizers
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D
Manures
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Solution
The correct option is A Pesticides ∙ Pesticides are chemicals used to kill unwanted insects. ∙ They can also be harmful to insects that help the farmers. ∙ Excess use of pesticides can lead to decrease in the fertility of the soil.