Which operation involves managing areas to protect assets and personnel?

The operation that involves managing areas to protect assets and personnel is known as "Guard." This type of operation is focused on ensuring the security and safety of critical items and individuals within a designated area, protecting them from potential threats or risks. The emphasis is on a proactive approach to maintaining a secure environment, including the employment of security forces, surveillance, and defensive measures.

In contrast, the other terms describe different operational tactics. The "Cover" operation usually refers to providing specific support to an operation, typically by engaging enemy forces or providing a buffer to facilitate movement. "Screen" refers to operations intended to gather intelligence or provide information about enemy movements while maintaining a safe distance. A "Task Force" is more of an organizational structure designed for a specific mission rather than a directly protective operation. Each term has its distinct role within military strategies, but "Guard" specifically highlights the management of areas to ensure safety.