Biology · Evolution

Competition is the correct answer because it serves as a natural mechanism for controlling population growth. When individuals compete for limited resources such as food, water, and habitat, only the most adapted survive and reproduce. This keeps the population in check and maintains ecological balance. In contrast, 'No competition' would lead to unregulated population expansion, while 'No polymorphism' and 'Polymorphism' relate to genetic diversity, affecting adaptability rather than directly regulating population growth.

Without competition, resources such as food and space would be abundant, potentially leading to rapid, unchecked population growth.

The absence of polymorphism refers to a lack of genetic variation, which affects adaptability and survival rather than directly influencing population growth rates.

Polymorphism increases genetic diversity and adaptability in a population but does not directly control population size or growth.

Competition acts as a natural check on population growth by limiting resource availability, leading to survival of the fittest and preventing overpopulation.