You are presented with the question "what is forced against the seed coat to cause the root to emerge from a seed?" and the following answer choices: 
- germination
 - UV
 - urea
 - h2o
 - sunflower
 - rain
 - oil
 - newtons

Now knowing that the force of water against the seed coat causes a root to emerge from a seed and water is made up of H2O molecules, choose the best answer.


 

    h2o     