Natural predators play a crucial role in ecosystems by maintaining population balance among prey species. They help control the numbers of herbivores and other species, preventing overpopulation that could lead to resource depletion. This trophic regulation fosters biodiversity and enhances ecosystem resilience, allowing for a diverse range of species to thrive. Additionally, predators can influence the behavior and distribution of prey, further contributing to the stability of ecosystems. Hence, their presence is vital for a healthy ecological balance.