Question

which best describes the advantage of pest resistance?
pests can tolerate more pesticides.
pesticides become less effective.
farmers do not have to use harsh chemicals to save their crops.
farmers can kills weeds without killing their cash crop.

Explanation:

Pest - resistant crops reduce the need for harsh pesticides. Option 1 is a negative aspect (increased pesticide tolerance in pests). Option 2 is also a negative (pesticide ineffectiveness). Option 4 is about herbicide - resistant crops (killing weeds) not pest - resistance. Option 3 aligns with the advantage of pest - resistance as it means less use of harsh chemicals for pest control.

Answer:

Farmers do not have to use harsh chemicals to save their crops.