Which type of ordinance is typically excluded from warning orders?

The correct choice highlights that special munitions are typically excluded from warning orders because they require specific caution and handling procedures that differ from conventional explosives. Special munitions can include a variety of weapon types that might have particular operational protocols or risks associated with their use, such as guided missiles or precision munitions.

In a warning order, the primary purpose is to inform personnel of imminent operations or the potential for hazard, and conventional explosives, biohazard materials, and tactical drones are included because they have more straightforward, established guidelines for safety and operational use. Special munitions, however, possess unique characteristics, potentially sensitive technology, or specific effects that necessitate a different level of consideration, hence their exclusion from generic warning orders. This distinction ensures safety and operational effectiveness when dealing with complex munitions in a military context.