increase in humidity decrease in temperature clouds forming in the sky winds blowing in the night
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In some locations, squirrels sleep for long periods of time during the winter months. Which of the following most likely causes these squirrels to sleep for long periods of time?
Possibilities:
- increase in humidity
- decrease in temperature
- clouds forming in the sky
- winds blowing in the night

decrease in temperature