Answer:
This phenomenon is called competitive exclusion, also known as Gause's Law or the principle of competitive exclusion. It states that when two species with similar resource requirements compete for the same resources in the same environment, one species will eventually outcompete and eliminate the other species. Competitive exclusion is based on the assumption that resources are limited and that no two species can occupy the exact same ecological niche indefinitely. As a result, the more competitive species will have better access to resources, leading to its dominance and the eventual exclusion of the less competitive species.