What is the cause of variation among individuals in a population?

The cause of variation among individuals in a population is primarily attributed to genetic composition, environmental influences, experiences, and learning. Genetic composition refers to the inherited traits from parents that shape the physical and behavioral characteristics of individuals within a species. These genetic factors can lead to a wide range of differences, from coloration and size to various behavioral tendencies.

Environmental influences play a significant role as well; factors such as habitat quality, food availability, and climate can affect how individuals develop and behave. Additionally, experiences and learning contribute to variation through the interactions individuals have with their environment, which can modify their behavior and adaptations over time. Together, these elements create a rich tapestry of diversity within populations, ensuring that not all individuals are the same and that they may respond differently to challenges and opportunities.

The other choices focus on specific traits or environmental factors, but they do not encompass the broad spectrum of genetic and experiential influences that drive variability in a population. While physical traits, age differences, and resource availability can influence behavior and survival, they are ultimately manifestations of the underlying genetic and environmental factors that contribute to variation among individuals.