Answer:
Carrying Capacity
Step-by-step explanation:
The carrying capacity of a biological species in an environment is the maximum population size of the species that the environment can sustain indefinitely, i.e. without over-stressing the resources like food, habitat, water, air, etc. so that their rate of replenishment is greater than the rate of consumption of the biological species it carries.
- The term carrying capacity was originally used to determine the number of animals that could graze on a segment of land without destroying it or overgrazing it.
In context of the human population, more complex variables like sanitation and medical care started playing an important role in the sustainable utilization of resources. As population density increases, birth rate often increases and with the increasing medical advancement the death rate typically decreases. The difference between the birth rate and the death rate is the "natural increase".