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

[EX Q]: some rain can changes the hue of litmus paper from blue to red
[EX A]: What color of litmus paper can be changed by rain?

[EX Q]: Locusts can spread disease and destroy crops.
[EX A]: What can spread disease and destroy crops?

[EX Q]: bats use muscles for flight
[EX A]:
What do bats use for flight?