alteration of a food web degradation of a habitat modification of a climate reversal of a flow of energy
I am hesitating between 4 options to answer the following question, which option should I choose?
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?
Possibilities:
- alteration of a food web
- degradation of a habitat
- modification of a climate
- reversal of a flow of energy

alteration of a food web