What type of rehearsal allows the commander to hear how subordinates will execute the plan?

A back-brief is a specific type of rehearsal where subordinates summarize their understanding of the commander's plan and explain how they intend to execute it. This process allows the commander to assess not only the subordinates' comprehension of the mission but also their approach to carrying out specific tasks.

During a back-brief, the subordinate relays their plan or actions in response to the commander's direction, which enables the leader to identify any potential misunderstandings, gaps in planning, or areas needing further clarification. This interaction enhances communication within the team and helps ensure that everyone is on the same page regarding the mission's objectives and execution.

In contrast, combined arms rehearsals focus on coordination among different branches and units operating together, while support rehearsals emphasize coordinating supporting units in specific roles. Battle drill rehearsals are methods to practice responses to specific situations but do not necessarily involve a detailed briefing format that allows for feedback on understanding the plan from subordinates. Thus, the back-brief stands out as the rehearsal specifically designed for this purpose.