What type of target is specifically known and planned for action in the operational environment?

The correct answer describes a target that has been deliberately identified, analyzed, and incorporated into operational plans. A planned target is one that has gone through the appropriate targeting process, allowing commanders to prepare and execute actions against it effectively. These targets are usually well-defined in terms of their significance, anticipated outcomes, and the methods intended for engagement. This ensures that forces are ready to take action when the operational circumstances demand it.

The other options refer to different aspects of target management. Established targets are those that are recognized and have history but may not have the detailed planning that planned targets do. Approved targets have received authorization but don't always reflect in-depth operational planning. Priority targets are those deemed most crucial for operations, but this designation does not necessarily indicate that they have been fully planned out in detail like a planned target.