The correct answer is option A, that is, some organisms have different reproductive success because of nongenetic traits.
The phenomenon in which some members of the population reproduce more offspring in comparison to the other is known as differential reproduction. This takes place because of the differences in the phenotypic features found in some members but not in others. This favors their survival and provides them with the chance to reproduce.
This can be illustrated by the color variation in the beetle populations. The brown beetles were identified and determined by the population of crow, while the green beetles were not detected easily by the crows, as they are living on grass, which is similar to their own color. Thus, the green color being a phenotypic nongenetic feature and provided a survival advantage to them over the brown beetles, and thus, such beetles will also get the chance to reproduce and grow in number.
