A balanced ecosystem is one in which all living organisms, including plants, animals, and microorganisms, coexist in harmony with each other and their environment. This means that there is a stable and sustainable relationship between the different species, with each playing a vital role in maintaining the overall health and functioning of the ecosystem. In a balanced ecosystem, there is a natural balance between predator and prey populations, as well as a healthy level of biodiversity and nutrient cycling. This balance helps to ensure the long-term survival and resilience of the ecosystem.