Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[EX Q]: The ability of matter to combine chemically with other substances is known as reactivity.
[EX A]: The ability of matter to combine chemically with other substances is known as?

[EX Q]: The thalamus helps to regulate consciousness, arousal, and sleep states.
[EX A]: What helps to regulate consciousness, arousal, and sleep states?

[EX Q]: Pheromones are released into the environment for communication between animals of the same species.
[EX A]:
What kind of hormones are released into the environment for communication between animals of the same species?