Q184. The Set of actions for a problem in a state space is formulated by a ___________
✅ Correct Answer: C) Successor function, which takes current action and returns next immediate state
Explanation: The most common formulation for actions uses a successor function. Given a particular state x, SUCCESSOR-FN(x) returns a set of (action, successor) ordered pairs, where each action is one of the legal actions in state x and each successor is a state that can be reached from x by applying the action.