They grow toward light. They grow toward surface warmth. They grow opposite the direction of the bedrock. They grow opposite the direction of the pull of gravity.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: How do the sprouts of seeds buried in complete dark in the soil find their way to the surface of the soil?
Possibilities:
- They grow toward light.
- They grow toward surface warmth.
- They grow opposite the direction of the bedrock.
- They grow opposite the direction of the pull of gravity.

They grow opposite the direction of the pull of gravity.