A subspecies is a taxonomy category that ranks below species, usually permanent geographical isolated race. <span />
Mutations can be categorized based on the kind of effect they have on an organism. Blue eyes in humans are a result of a mutation in the OCA2 gene, which controls the production of pigment melanin in the iris.
This mutation is an example of a neutral mutation. Such mutations have no effect on an organism’s survival.
Answer: A Solar Energy (The Sun)