An ecosystem is a community of living organisms, like plants and animals, interacting with each other and their environment. This includes everything from the soil and water to the air and sunlight. For example, in a forest ecosystem, trees, birds, insects, and fungi all play important roles, helping each other survive and thrive. Ecosystems can be found in many places, such as oceans, deserts, and wetlands. Each ecosystem has its own unique balance, where every species, like deer or fish, contributes to the overall health. When one part of the ecosystem is affected, it can impact the entire system, showing how interconnected life really is.