Which types of munitions are primarily used in fire support?

High-explosive, smoke, and illumination munitions are primarily used in fire support due to their effectiveness in different combat scenarios. High-explosive munitions are essential for delivering critical firepower to neutralize enemy targets and provide overwhelming force on the battlefield. Smoke munitions serve to obscure the battlefield, providing cover for maneuvering forces, screening troop movements, and obscuring enemy sightlines. Illumination munitions are crucial for nighttime operations, allowing for visibility in dark conditions and enabling friendly forces to engage the enemy effectively.

The other options, while they may include types of munitions used in military operations, do not encapsulate the primary focus of fire support. Low-explosive and incendiary munitions can sometimes be used in specific contexts, but they are not the core of fire support roles. Likewise, precision-guided munitions are valuable for target accuracy, and while useful, they do not cover all aspects of traditional fire support. Scatterable munitions and electronic warfare devices also focus on different operational objectives, making them less essential to conventional fire support roles. This makes the first option the most comprehensive and relevant choice regarding the primary types of munitions used in fire support.