Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[Q]: Question: Original atoms are called what type of isotopes? Answer: parent
[A]: Direction is an important component of motion.

[Q]: Question: Solvation involves surrounding ions with what? Answer: solvent particles
[A]: Solvation involves surrounding ions with solvent particles.

[Q]: Question: Fossils provide a window into the past. they are evidence for what? Answer: evolution
[A]:
Fossils provide a window into the past. They are evidence for evolution.