What is the concept of evolution primarily concerned with?

The concept of evolution is fundamentally focused on the change in inherited characteristics over generations. This process is driven by mechanisms such as natural selection, genetic drift, mutations, and gene flow, which influence how traits are passed down and altered in populations over time.

When discussing evolution, it is crucial to recognize that it emphasizes the gradual changes that occur in the genetic makeup of organisms, which can lead to adaptations that enhance survival and reproduction in a given environment. This overarching process explains how species evolve and diversify, ultimately leading to the rich variety of life we see today.

The other options highlight specific aspects related to evolution, such as biodiversity and survival tactics, but they do not capture the core definition of evolution itself, which is centered around the cumulative changes in genetic traits across successive generations.