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

[Q]: Ectothermic vertebrates control body temperature to just a limited extent from the outside by changing behavior.
[A]: What type of vertebrates control body temperature to just a limited extent from the outside by changing behavior?

[Q]: Combustion reaction occurs when a substance reacts quickly with oxygen.
[A]: What occurs when a substance reacts quickly with oxygen?

[Q]: Shared electrons does fluorine attract better than any other element.
[A]:
What does fluorine attract better than any other element?