Step 1: Recall the three linked elements of delegation.
Delegation works through authority, which flows down from a manager, responsibility, which is the subordinate's obligation to complete the task, and accountability, which is the answerability for how the task actually turned out.
Step 2: Focus on what the question is asking.
It asks for the term describing being answerable for the outcome of a task that has already been assigned, not the right to act or the duty to perform it.
Step 3: Match the definition to the correct term.
That answerability for the final result is precisely what accountability means, and unlike authority or responsibility, accountability can never be delegated further down the line.
Final answer: Option 3, the term being described is accountability.