Here's a problem to solve: Many desert animals are only active at night. How does being active only at night most help them survive in a hot desert climate?

Among the 4 following options, which is the correct answer?

- A: They can see insects that light up at night.
 
- B: Their bodies lose less water in the cool night air.
 
- C: They are able to find more plant food by moonlight.
 
- D: Their bodies absorb sunlight in the daytime while they sleep.
 