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

Fact 2: Water is made up of H2O molecules.

Given the two facts above, answer the question "what is forced against a seed coat causing the root to emerge?" with the following options: 
- thorns
 - H2O
 - weathering
 - rain
 - CO2
 - H20
 - flow
 - urea


 

  H2O       