The primary focus of evolutionary biology is to understand the processes that drive biological change and the mechanisms of evolution. This field examines how species originate, adapt, and diversify over time through mechanisms such as natural selection, genetic drift, and gene flow. Evolutionary biologists study the relationships among organisms, their evolutionary histories, and the molecular basis of adaptation. By analyzing genetic variations and fossil records, they can trace the lineage and changes in populations. Ultimately, evolutionary biology helps explain the diversity of life on Earth and informs conservation efforts by highlighting the importance of genetic variation.