Energy is used to break down glucose in the presence of oxygen to produce carbon dioxide and water.
That we all came from a common ancestor.
There is no answer that is right except for C. Natural Selection.
Genetic Recombination doesn't change gene frequency;nor does migration. (Unless it's local)
Mutation could be the answer, but since mutations are too rare to really power Evolution, the only logical answer is Natural Selection.
There is an irruption
Lava gets cooled with water (lake)
It turns to magma
