natural selection selective breeding aerobic respiration sexual reproduction
I gave my students this multiple choice question: A farmer sprayed his orange trees with a pesticide to eliminate the insects damaging the trees. Some of the insects survived and produced offspring that were also resistant to the insecticide. Which process is illustrated by the pesticide resistance of the offspring?

Only one answer is correct among these 4 choices:
- natural selection
- selective breeding
- aerobic respiration
- sexual reproduction

Could you tell me which one is correct?

natural selection