Fact 1: The force of water against the seed coat causes a root to emerge from a seed.

Fact 2: Most waves are formed from the force of wind against the water.

Given the two facts above, answer the question "What against the seed coat causes a root to emerge from a seed?" with the following options: 
- warmth
 - calcite
 - lipids
 - an ion
 - fibrous
 - waves
 - heat
 - acidity


 

      waves   