a decrease in daylight hours an increase in air temperature an increase in precipitation a decrease in air pressure
I gave my students this multiple choice question: Some frog species will bury themselves in mud if the environment becomes very dry. The frogs enter into a type of hibernation. Which would be the most likely signal for the frogs to emerge from the mud?

Only one answer is correct among these 4 choices:
- a decrease in daylight hours
- an increase in air temperature
- an increase in precipitation
- a decrease in air pressure

Could you tell me which one is correct?

an increase in precipitation