You are presented with the quiz "Something that is a push or a pull of water against the seed what causes a root to emerge." 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "the force of water against the seed coat causes a root to emerge from a seed" and "forces A force is a push or a pull". 

So, what's the best answer to the question?


 

       coat    