Concept:Diplomats are the official representatives who manage peaceful relations between states, groups, or individuals.
Explanation:Diplomats represent their country abroad and handle negotiations, treaties, and international cooperation.
Their main functions include dialogue, conflict resolution, and building mutual understanding.
These activities are what primarily sustain peace between states and groups.
The legislature, media, and security agencies only support peace indirectly in their own roles.
Therefore, the art of maintaining peaceful relationships comes mostly from the work of diplomats.
Answer:The correct option is C. diplomats.