Fact 1: Skin is used for breathing air by frogs.

Fact 2: Frogs belong to the Class Amphibia, and rely on moisture to breathe, reproduce and survive.

Given the two facts above, answer the question "What do frogs need to survive?" with the following options: 
- food
 - friends
 - Water
 - predators
 - lungs
 - skin
 - warmth
 - desert


 

      skin   