What requires commanders to effectively convey a clear commander's intent and concept of operations?

The correct choice is rooted in the concept of Mission Command, which emphasizes decentralization of command and requires commanders to articulate a clear commander's intent and concept of operations. This approach allows subordinates to understand the desired end state and act independently within that framework, adapting to changing situations on the ground while still aligned with higher-level objectives.

Mission Command encourages initiative and flexibility among leaders and soldiers, fostering an environment where decision-making can happen at all levels. This clarity in communication helps ensure that everyone understands not only what needs to be accomplished but also the broad approach and objectives that guide their actions. In contrast, while operational planning, strategic command, and tactical coordination are related concepts, they do not inherently require the same level of emphasis on commander's intent and decentralized execution as Mission Command does.