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Why would two organisms compete in an ecosystem? The answer lies in the fundamental principles of natural selection and survival of the fittest. In any given habitat, resources such as food, water, and space are limited, and organisms must compete for these necessities to ensure their survival and reproduction. This competition is a driving force behind the intricate dynamics of ecosystems, shaping the distribution, abundance, and interactions among different species. In this article, we will explore the various reasons why organisms compete within an ecosystem and how this competition contributes to the overall stability and evolution of these complex systems.