Given a scientific question, generate a correct answer to it.

Input: Consider Input: Learning to get used to something after being exposed to it for a while is associated with what kind of learning?

Output: habituation

Input: Consider Input: Do particles collide more in two reactants when they are both in fluid forms or solid forms?

Output: fluid

Input: Consider Input: Pale skin and reduced eyes in salamanders that live in dark caves are an example of what?
Output: adaptations