With the increase in the population of a species, the competition between them also increases.
How competition affect a population?
An association between two or more individuals of the same population or two or more populations in which each negatively influences the other in access to a restricted resources like food, shelter, water, mates, nesting, etc is termed competition.
When the size of a population increases, one can witness more intense competition between the individuals of the population. The influence of competition is generally density-dependent, that is, at greater population density, there is an increase in competition. This will negatively affect the size of the population.
Thus, the correct answer is option D, that is, competition.
Find out more information about the influence of competition on the population here:
https://brainly.com/question/13890769
