Which organization typically includes both army and aviation units for mission planning?

The organization that typically includes both army and aviation units for mission planning is the Brigade Aviation Element. This element serves as the liaison between the brigade's ground forces and the aviation units, ensuring effective coordination and integration for various missions. The Brigade Aviation Element's primary role is to support brigade-level planning and operations, encompassing both aviation and ground aspects, which is critical for successful mission execution.

While other options may involve army or aviation units, they do not primarily function as an organizational body that integrates them for planning purposes at the brigade level. For instance, an Attack Reconnaissance Battalion focuses more on specific reconnaissance operations rather than broader mission planning across units. The Combat Aviation Brigade primarily consists of aviation units, while a Forward Arming and Refueling Point is more operationally focused on logistics rather than planning and coordination across both army and aviation forces. Hence, the Brigade Aviation Element is the most fitting choice for this context.