Which type of task includes actions necessary for a unit's mission but are not explicitly assigned?

The correct answer highlights the concept of "implied tasks," which are actions vital for the successful completion of a unit's mission that are not explicitly outlined in tasking orders or directives. These tasks may arise from the unique context of the mission or the operational environment and typically stem from the commander's intent or the overarching objectives.

Implied tasks require a deeper understanding of the operational environment and the initiative from leaders to identify what must be done beyond the written orders. For instance, if a unit is tasked with capturing a location, it may also need to conduct reconnaissance, coordinate with other units, or manage logistics—actions deemed necessary but not detailed in the task order. Recognizing and acting on these implied tasks is crucial for mission success, as they fill in the gaps that specified tasks do not cover.