Fact 1: Thirst is used to make an animal realize that it needs to replenish its bodily water by the body.

Fact 2: Humans are animals too.

Given the two facts above, answer the question "what uses thirst to realize it needs to replenish bodily water?" with the following options: 
- Mammal
 - humans
 - omnivores
 - oxygen
 - h2o
 - bears
 - Lobsters
 - drinks


 

  humans       