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.

[EX Q]: Question: The number of electrons in the outer energy level determines what property of nonmetals? Answer: reactivity
[EX A]: Some nonmetals are very reactive, whereas others are not reactive at all. It depends on the number of electrons in their outer energy level.

[EX Q]: Question: What type of competition occurs between members of the same species? Answer: intraspecific
[EX A]: Intraspecific competition occurs between members of the same species. For example, two male deer may compete for mates by clashing their antlers together.

[EX Q]: Question: How does the image focused by the eye travel to the brain? Answer: the optic nerve
[EX A]:
The image focused by the eye travels through the optic nerve to the brain as electrical signals. The brain interprets the signals and "tells" us what we are seeing.