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

Fact 2: Acorns are the seeds of oak trees.

Given the two facts above, answer the question "What causes a root to emerge from an acorn?" with the following options: 
- lipids
 - leaves
 - air
 - water
 - glaciers
 - erosion
 - fungi
 - solutes


 

    water     