Answer:
The correct answer is limiting factor.
Step-by-step explanation:
The limiting factor in ecology, signifies towards the environmental conditions that limits the growth, abundance, or distribution of a population of organisms or species in an ecosystem. The limiting factors, in nature like the availability of food, water, space, and shelter can amend the plants and animals' populations. Other kinds of limiting factors like competition for resources, predation, and disease or plague can also affect the populace. If any of the limiting factors, that is, mentioned differs, the populations of animals and plants also get fluctuated.