Answer :

The size of a population is limited to the carrying capacity of the environment due to various factors related to resource availability, competition, and environmental constraints.

1. Resource Availability:The carrying capacity represents the maximum population size that the environment can support based on the availability of essential resources such as food, water, shelter, and space.

2. Competition: As a population grows, individuals within the population compete with each other for resources.

3. Environmental Constraints:Environmental factors such as climate, temperature, humidity, and other abiotic factors can also limit the size of a population.

4. Predation and Disease:In addition to resource availability and environmental factors, populations are also limited by predation and disease. As populations increase, they may become more susceptible to predation and disease outbreaks, which can further reduce population size.

Overall, the carrying capacity of the environment represents the maximum population size that can be sustained over the long term. Populations tend to fluctuate around this carrying capacity as they respond to changes in resource availability, competition, and environmental conditions.