Fact 1: Waxy leaves are used for storing water by some plants.

Fact 2: Many cacti also have a waxy coating that helps the plant conserve moisture in desert climates.

Given the two facts above, answer the question "What do some cacti use waxy leaves for?" with the following options: 
- hydration
 - Chemical energy
 - storing water
 - it needs them
 - support
 - survival
 - to stay warm
 - cellulose


 

   storing water      