The balance of nature is a theory that proposes that ecological systems are usually in a stable equilibrium or homeostasis, which is to say that a small change (the size of a particular population, for example) will be corrected by some negative feedback that will bring the parameter.There is a delicate balance between predator and prey. The ecosystem is often balanced when the living organisms such as plant, humans, and animals are in harmony. Humans are key in maintaining such a balance since the balance is dependent on their activities.