Fact 1: Cells cannot survive without oxygen.

Fact 2: Plants stabilize soils and oxygenate the atmosphere.

Given the two facts above, answer the question "cells cannot survive without plants replenishing the what" with the following options: 
- Energy.
 - during the day
 - atmosphere
 - mountains
 - rain
 - heat energy
 - Energy
 - streams


 

   atmosphere      