increase in the number of parks decline in the amount of seawater increase in number of homes built decline in the amount of predators
I gave my students this multiple choice question: The Miami Blue butterfly is an endangered species in South Florida. Which factor has most likely caused the population decline of this butterfly?

Only one answer is correct among these 4 choices:
- increase in the number of parks
- decline in the amount of seawater
- increase in number of homes built
- decline in the amount of predators

Could you tell me which one is correct?

increase in number of homes built