Resource scarcity, such as limited food, water, and shelter, creates competition among organisms for access to these resources. Organisms that are better at competing for and utilizing resources will have a higher chance of survival and reproduction, passing on their advantageous traits to future generations. As resources become scarcer, competition intensifies, leading to natural selection favoring individuals with traits that help them secure the necessary resources for survival. This process ultimately drives the evolution of organisms, enabling them to better adapt to their environment and increase their chances of survival in the face of resource scarcity.
