Do you need predators in nature, prove your point of view.

Only herbivores or carnivorous animals cannot exist in one ecosystem, because the presence of an incomplete food chain in an ecosystem threatens with the extinction of resources. So herbivores regulate the number of plants by eating old ones, thereby clearing the way for young plants. Predators regulate the number of herbivores, preventing them from filling the vastness and eating all the plants. In this way, predators maintain a balance in the ecosystem.