Fact 1: The looseness of soil increases the amount of oxygen in that soil.

Fact 2: Without oxygen in the soil, most plants die.

Given the two facts above, answer the question "What helps plants survive?" with the following options: 
- nutrients
 - staying warm
 - Loose pants
 - hydration
 - hydrate their cells
 - Looseness of soil
 - Looseness of belt
 - Looseness of lips


 

      Looseness of soil   