What is one key reason for using suppressive fire in combat?

Using suppressive fire in combat is primarily aimed at temporarily immobilizing the enemy. This tactic creates a covering fire that hampers an enemy's ability to move, shoot, or respond effectively. By laying down a heavy volume of fire in the direction of enemy forces, it suppresses their actions, forcing them to seek cover and reducing their effectiveness. This temporary immobilization allows friendly forces to maneuver, regroup, or advance without facing immediate retaliation from the enemy.

While other options mention aspects of warfare, they do not relate directly to the primary tactical objective of suppressive fire. For instance, engaging in negotiations does not involve the use of weaponry and is typically a diplomatic process. Signaling allies may involve visual or other communication methods that do not require suppressive fire. Psychological warfare aims to undermine the enemy's morale and is a broader strategy that is not the specific function of suppressive fire. Therefore, the focus on immobilizing the enemy is crucial to understanding the role of suppressive fire in combat scenarios.