Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Constructive forces type of forces are involved when deposited rock forms deltas or barrier islands.
What type of forces are involved when deposited rock forms deltas or barrier islands?

Starches are complex carbohydrates that are the polymers of glucose.
What complex carbohydrates are the polymers of glucose?

Phototaxis is the term for movement toward light.
What is the term for movement toward light?