Fact 1: Acactus stem is used for storing water.

Fact 2: Other animals eat cactus to get water.

Given the two facts above, answer the question "Why do animals eat stems?" with the following options: 
- Animal survival
 - A transportation fuel
 - it keeps an organism warm
 - It gets more light
 - basic building blocks of life
 - Plants store liquids there
 - it needs them
 - Help plants grow


 

      Plants store liquids there   