Concept:A vapour that exists in dynamic equilibrium with its own liquid is called a saturated vapour.Explanation:In a closed container, liquid evaporates and vapour condenses at the same rate.This state is called dynamic equilibrium because both processes continue but no net change occurs.The vapour present in this equilibrium is saturated vapour.An unsaturated vapour can still hold more vapour particles and is not in equilibrium with its liquid.Therefore, the correct option is C.Answer:C. saturated