What should an officer do to ensure the subject's safety while using decentralization tactics?

The focus on controlling the speed of the subject's descent is crucial when employing decentralization tactics. This tactic is intended to safely lower a subject to the ground in a manner that minimizes the risk of injury to both the subject and the officer. By carefully controlling how quickly the subject is brought down, the officer can prevent potential falls that might lead to harm, ensuring the subject’s safety throughout the process. Additionally, using techniques that promote a gradual descent can help maintain stability and control over the situation, fostering a safer environment for everyone involved.

In contrast, other options may have different implications for safety. Immediate use of physical restraints could escalate the situation or lead to injury if not executed properly. Calling for backup can indeed provide additional support but does not directly address the immediate concerns of safely decentralizing a subject. Applying pressure to joints is a technique that requires precise control and can carry risks, potentially leading to injury rather than ensuring safety during the decentralization process. Therefore, controlling the descent is the safest approach in this context.