Given a statement, generate a question such that the answer is contained in that statement.

[Q]: Algae play significant roles as producers in water areas.
[A]: Algae play significant roles as producers in what area?

[Q]: signals are detected by the optic nerve
[A]: What type of nerve detects signals?

[Q]: Scales enable tarpon ih reduce resisting force to motion.
[A]:
What enable tarpon ih reduce resisting force to motion?