What should you do with the equipment when leaving the work area?

The correct choice emphasizes the importance of both safety and operational protocol when leaving a work area. Parking the equipment on a firm, level surface ensures stability, preventing any potential tipping or rolling that might occur on uneven ground. Additionally, securing the equipment—whether with controls engaged to prevent unintended movement or using physical barriers—helps to ensure that it remains in position and does not pose any hazards to other workers or passersby.

This practice is essential in construction and hoisting operations as it minimizes risks associated with equipment malfunctions or accidents that can happen if the equipment is left unsecured. The other options fail to address both safety and best practices adequately; for instance, leaving equipment running can lead to safety hazards and waste fuel, while leaving it in place may not guarantee it is safe and secure. Moving it to a storage area could be necessary in some situations, but it doesn't address the immediate concerns of parking and securing the equipment effectively.