Which type of variation would include differences like skin color in a species?

Variation within a species refers to the differences that occur among individuals of the same species, such as skin color, eye color, height, and other physical traits. This concept embraces the diversity found in traits that may arise from genetic factors, environmental influences, or a combination of both. Skin color, for instance, can vary due to genetic differences but is still a characteristic of individuals belonging to the same species, highlighting how such variations contribute to the overall diversity of that species.

In the context of biological diversity, understanding variation within a species is essential because it plays a crucial role in adaptability and survival. This variation can lead to better survival opportunities for individuals in changing environments and can also affect reproductive success, as certain traits might be more attractive to potential mates.