Answer:
The correct answer is C. Natural phenomena.
Step-by-step explanation:
Food and territory are two factors that clearly influence the development of life within an ecosystem: the abundance or lack of these factors will clearly be decisive in the normal development of life within the ecosystem, that is, the greater the territory and food, the better the quality of life of the living beings in said ecosystem.
In turn, food and territory are affected by various natural phenomena, which condition the abundance or lack of these factors: thus, phenomena such as earthquakes, floods, fires, etc., cause the territory and food to fluctuate as soon as to their quantities.