In terms of fire classifications, which type involves firing from high ground to low ground?

Plunging fire is characterized by the shooting that occurs from a high position to a target situated at a lower elevation. This type of fire is effective because the projectile follows a steep, downward trajectory, which can result in increased accuracy and effectiveness against targets in the lower elevation, often with reduced chances for cover. When a machine gunner engages in plunging fire, the elevation advantage means they can fire upon the enemy while minimizing exposure to their fire, which adds to the tactical effectiveness of this method. Given the mechanics of how plunging fire operates, it is especially useful in hilly or mountainous terrain, where elevation differences can significantly impact the engagement. This explains why plunging fire is the correct choice for the classification involving firing from high ground to low ground.