You are presented with the question "What against the seed coat causes a root to emerge from a seed?" and the following answer choices: 
- warmth
 - calcite
 - lipids
 - an ion
 - fibrous
 - waves
 - heat
 - acidity

Now knowing that the force of water against the seed coat causes a root to emerge from a seed and most waves are formed from the force of wind against the water, choose the best answer.


 

      waves   