Question

what is a major goal of using pesticides today?
to make pests become resistant to pesticides
to control pests and avoid economic damage
to develop very contaminated food stocks
to wipe out (eradicate) every pest on earth

Explanation:

Pesticides are used to manage pests. Their main aim is to stop pests from causing economic harm (like crop loss). Making pests resistant is a problem (not a goal). Developing contaminated food stocks is bad (not a goal). Wiping out all pests is unrealistic and harmful (ecosystem balance). So, controlling pests to avoid economic damage is the major goal.

Answer:

to control pests and avoid economic damage