Why do organisms compete and what are they competing for?

Organisms compete primarily for limited resources essential for survival and reproduction, such as food, water, territory, and mates. This competition arises because these resources are not abundant enough to satisfy all individuals in a population. The struggle for these resources can drive natural selection, influencing traits that enhance an organism's ability to secure what it needs to thrive. Ultimately, competition shapes ecosystems and affects biodiversity as species adapt to their environments.