You are presented with the quiz "What can happen when an animal doesn't drink enough water?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "thirst is used to make an animal realize that it needs to replenish its bodily water by the body" and "general signs of dehydration include Thirst". 

So, what's the best answer to the question?


 

     Dehydration      