Gene flow is the transfer of genetic material between populations of the same species. This process occurs when individuals migrate and breed with members of another population, introducing new alleles into the gene pool. It can enhance genetic diversity, which is important for the adaptability and survival of species. Factors such as wind, water, and animal movement can facilitate gene flow by allowing organisms to disperse and interbreed. This exchange of genetic information can help populations adapt to changing environments and reduce the risks of inbreeding, ultimately contributing to the overall health of ecosystems.