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

[EX Q]: A radio is used for exchange of knowledge.
[EX A]: What is a radio used for?

[EX Q]: hornworts occupy niches in wet habitats
[EX A]: What occupy niches in wet habitats?

[EX Q]: The outermost whorl of changed leaves are usually green
[EX A]:
What is the color of the outermost leaf?