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

[EX Q]: Natural resource type of resource is limited in supply and cannot be replaced except over millions of years.
[EX A]: What type of resource is limited in supply and cannot be replaced except over millions of years?

[EX Q]: Learning to get used to something after being exposed to it for a while is associated with habituation learning.
[EX A]: Learning to get used to something after being exposed to it for a while is associated with what kind of learning?

[EX Q]: Sugar and lipids does fiber help keep at normal levels in the body.
[EX A]:
What does fiber help keep at normal levels in the body?