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

The thalamus helps to regulate consciousness, arousal, and sleep states.
What helps to regulate consciousness, arousal, and sleep states?

At a convergent plate boundary, when one plate is oceanic, there are large volcanoes.
At a convergent plate boundary, when one plate is oceanic, there are large what?

Unstable isotopes give off particles and energy as radioactivity.

Unstable isotopes give off particles and energy as what?