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

[Q]: Triathlons require a lot of calories
[A]: What type of sport requires a lot of calories?


[Q]: Frogs use a larynx to interface.
[A]: What does a frog use to interface?


[Q]: h2o is essential for all plants on Earth
[A]:
What is essential for all plants on Earth?