Which principle emphasizes the importance of decision-making and execution by a single commander?

The principle that emphasizes the importance of decision-making and execution by a single commander is Unity of Command. This principle ensures that all forces involved in an operation are directed by one leader, which facilitates coherent and coordinated efforts. When a single commander is responsible for decision-making, it simplifies the chain of command and allows for rapid decision-making, ensuring that all actions are aligned towards a common goal.

Unity of Command is crucial during military operations because it helps to reduce confusion and conflict that can arise from multiple leaders giving orders. This clarity is vital to executing strategies effectively and maintaining operational efficiency. By consolidating authority, a singular vision is more easily communicated and enacted, thereby optimizing the use of available resources and enhancing overall operational effectiveness.

The other principles, while important in their own right, focus on different aspects of military strategy and do not strictly address the singular command structure that Unity of Command advocates. Hence, the focus on cohesive and unified leadership under one commander is what makes Unity of Command the correct answer.