Which term refers to the act of executing a duty or responsibility?

The term that specifically denotes the act of executing a duty or responsibility is "execution." In this context, execution refers to the carrying out or putting into effect of a planned action, task, or duty, ensuring that it is done as intended. It emphasizes the process of actively fulfilling responsibilities, which involves not only the initiation of tasks but also following through to ensure they are completed as planned. This aligns closely with the context of duties, where the focus is on the action taken in realizing obligations.

While "performance," "implementation," and "completion" are related concepts, they denote different aspects of the process. Performance often relates to how well a duty is executed, implementation refers to the steps taken to put a plan into effect, and completion signifies that a task is finished but does not inherently describe the act of executing the task itself. Execution distinctly captures the notion of actively managing and carrying out responsibilities.