Genetic diversity plays a crucial role in the sustenance of a species by enhancing its ability to adapt to environmental changes. The wide range of gene variations within a population enables individuals to withstand various forms of environmental stress. For instance, some individuals may possess better traits to endure increasing pollution, while others may lack this capacity, resulting in infertility or even death under such conditions.
Natural selection comes into play as those individuals with the genetic makeup suited for the prevailing environmental challenges survive and reproduce. Over time, this process can lead to a reduction in genetic diversity within specific habitats, as only those individuals with advantageous traits persist. Consequently, the adaptability conferred by genetic diversity contributes significantly to the overall survival and well-being of a species.