overgrazing eutrophication invasion by non-native species overproduction of greenhouse gases
I gave my students this multiple choice question: Lions tend to prey on primary consumers like zebras and gazelles. If there were a sudden decline in a population of lions, which ecological imbalance would most likely occur in the habitat?

Only one answer is correct among these 4 choices:
- overgrazing
- eutrophication
- invasion by non-native species
- overproduction of greenhouse gases

Could you tell me which one is correct?

overgrazing