In nature, organisms mate without human interference. this is called…

no "artificial selection" is when humans select "with intent" different organisms too reproduce together. The oposit of this is "Natural selection", which is what you want.

the millers tale is the answer.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.