concept

Homeostasis

The ability of a system to maintain a stable internal state in the face of a changing outside. Your body holds its temperature near 37°C whether the day is hot or cold; that is homeostasis. The core mechanism is always a negative feedback loop: a deviation from the set point triggers the very correction that pulls it back. The idea comes from physiology but extends naturally to planetary scale - a world that holds its temperature, atmospheric composition, or ocean pH steady through feedback loops is exhibiting homeostasis too, even with no organ "deciding" to do so. The Na'vi call it keeping the balance of life.