Fact 1: Acactus stem is used for storing water.

Fact 2: Proper watering is important to the successful growth of the Christmas cactus.

Given the two facts above, answer the question "what do cactuses save?" with the following options: 
- water
 - germs
 - energy
 - dirt
 - oxygen
 - soil
 - survive
 - Frogs.


 

 water        