What is the main reason predator populations stay in check within an ecosystem? a. Ecosystems are constantly changing, making predator populations unstable. b. Predators compete for resources with other predators. c. Prey populations are limited, affecting predator reproduction. d. Predators eventually become prey for other animals.

Predator populations remain in check mainly because their survival is closely tied to the availability of prey. When prey populations grow too small, it becomes harder for predators to find enough food, which can lead to decreased reproduction rates and increased mortality. This delicate balance helps to regulate predator numbers over time. Additionally, competition among predators for limited resources can further stabilize their populations. When predator populations get too high, they may start competing for food, leading to a natural reduction in numbers as weaker individuals struggle to survive. This dynamic keeps ecosystems functioning smoothly and prevents any single species from dominating.