You are presented with the quiz "What is an animal experiencing when they need to replenish their body 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 "common symptoms of dehydration are thirst, fatigue, headache, dizziness and dark, scant urine". 

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


 

 Dehydration          