Step-by-step explanation:
A stable ecosystem can exist even while the population in it change over time because ecosystems are composed of many different species that interact with each other in complex ways. These interactions create a balance in the ecosystem, where each species has a role to play and depends on other species for survival. As the population of one species changes, it can have an impact on other species, but the ecosystem as a whole can adapt and adjust to these changes. In addition, there are often multiple factors that regulate population size, such as availability of food and resources, predators, and disease, which can help maintain stability in the ecosystem. Furthermore, many species have adaptations that allow them to regulate their own population size, such as territorial behavior or reproductive strategies. Overall, a stable ecosystem is able to maintain a balance despite fluctuations in population sizes, as long as the interactions between species remain intact.