Given a statement, generate a question such that the answer is contained in that statement.
--------
Question: Researchers use telescopes to study black holes.

Answer: What do researchers use to study black holes?


Question: braking or slowing for turns can cause skidding.

Answer: braking or slowing for turns can cause what?


Question: algae plays significant roles as food in water ecosystems

Answer:
What plays a significant role as food in water ecosystems?