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

[Q]: Line graphs are especially useful for showing changes over time.
[A]: Line graphs are especially useful for showing changes over what?


[Q]: Environmental changes is most responsible for the extinction of most species of plants and animals that have lived on earth.
[A]: What process is most responsible for the extinction of most species of plants and animals that have lived on Earth?


[Q]: The core is the sun's innermost layer.
[A]:
What is the suns innermost layer called?