A
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### 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?

### Choices:
A. alteration of a food web
B. degradation of a habitat
C. modification of a climate
D. reversal of a flow of energy

### Answer:
