Theory of Evolution by Natural Selection

The Theory of Evolution by Natural Selection explains how species change over time. Individuals within a species show variations—differences in traits like size or speed. Some traits provide an advantage in survival or reproduction in a given environment. These advantageous traits are more likely to be passed on to the next generation. Over many generations, beneficial traits become more common, leading to gradual changes in the species. This process, driven by natural pressures, explains the diversity of life and how organisms adapt to their environments.