In science, conservation refers to the principle that a certain quantity remains constant over time, even though it may be transformed or redistributed.

Here are some examples:

* Conservation of energy: Energy cannot be created or destroyed, only transformed from one form to another.

* Conservation of mass: The total mass of a closed system remains constant, even if chemical reactions or physical changes occur.

* Conservation of momentum: The total momentum of a system remains constant in the absence of external forces.

Therefore, the statement accurately describes the core concept of conservation in science.