Variations that decrease reproductive success are more likely to be passed on.
Explanation:
Variations refer to environmental or genetic differences between organisms related by descent. The variations can be due exclusively to the environment, and therefore are not hereditary, but they can also be reproduced by changes in the genetic makeup, being in this case, hereditary.
As you can see, a term related to variations is heredity (tendency for equals to generate equals, that is, it explains the fact that descendants resemble their ancestors). Variations that decrease reproductive success are more susceptible to transmission, that is, they are more likely to be inherited as a hereditary factor.
