Reproductive success is measured by the:

A) body mass of an organism.
B) number of viable offspring.
C) longevity of an organism.
D) population size.
E) amount of food it eats.

Reproductive Success

The ability of an organism to produce offspring that survive and reproduce, thus passing genes to the next generation.

Viable Offspring

Offspring that are capable of survival and reproduction, contributing to the genetic continuity of a species.