the fertility of the soil the population of producers in the area the amount of food scraps left by predators the rate at which primary consumers moved into the area
I gave my students this multiple choice question: Different species of herbivorous rodents lived in the same ecosystem. Which factor most likely increased, causing more competition for resources among the rodents?

Only one answer is correct among these 4 choices:
- the fertility of the soil
- the population of producers in the area
- the amount of food scraps left by predators
- the rate at which primary consumers moved into the area

Could you tell me which one is correct?

the rate at which primary consumers moved into the area