an increase in the number of bats a decrease in the number of mosquitoes an increase in the number of insect-eating birds a decrease in the number of Japanese beetles
I gave my students this multiple choice question: A marsh in your neighborhood dried up during a long, hot summer. This is most likely to cause which of the following changes in the neighborhood?

Only one answer is correct among these 4 choices:
- an increase in the number of bats
- a decrease in the number of mosquitoes
- an increase in the number of insect-eating birds
- a decrease in the number of Japanese beetles

Could you tell me which one is correct?

a decrease in the number of mosquitoes