The following could be reasons why population sizes may reach and maintain plateaus are fewer deaths, limits in food supply and increased birth rates.
What is the relationship between natural selection and population?
Natural selection can cause microevolution (change in allele frequency), which causes fitness-enhancing alleles to become more common in the population. Fitness is a measure of reproductive success (how many offspring an organism leaves for the next generation, relative to others in the group).
Another factor that limits the growth of populations is densification. This means that a large number of individuals present at the same time in the same area reduces the availability of resources for the population as a whole, increasing the mortality rate and reducing reproductive success.
See more about population at brainly.com/question/16138725
#SPJ2
