You are presented with the question "What do frogs need to survive?" and the following answer choices: 
- food
 - friends
 - Water
 - predators
 - lungs
 - skin
 - warmth
 - desert

Now knowing that skin is used for breathing air by frogs and frogs belong to the Class Amphibia, and rely on moisture to breathe, reproduce and survive, choose the best answer.


 

      skin   