alteration of a food web degradation of a habitat modification of a climate reversal of a flow of energy
I gave my students this multiple choice question: When hunting by humans causes a species to become extinct, this may produce damaging effects throughout the ecosystem of the extinct species. What is the cause of this damage?

Only one answer is correct among these 4 choices:
- alteration of a food web
- degradation of a habitat
- modification of a climate
- reversal of a flow of energy

Could you tell me which one is correct?

alteration of a food web