Which of the following describes "plummeting fire"?

"Plummeting fire" is best described as fire delivered at a steep angle downwards. This type of fire is characterized by its trajectory, which is much more vertical compared to conventional horizontal fire. The steep angle allows for greater effectiveness in hitting targets that are directly below the firing position, such as in mountainous terrain or when engaging enemy positions that are at a lower elevation. This method is particularly useful in maximizing the impact of the firepower while minimizing exposure to enemy return fire, as the attacking units can often remain concealed.

In contrast, other descriptions do not capture this specific focus on angle and trajectory. Horizontal fire refers to fire directed level to the ground, while firing aimed directly at an enemy position could encompass a variety of firing angles. Dispersed fire, on the other hand, indicates a broader spread without regard to angle, aiming instead for coverage over a wide area rather than focused impact on a specific target below.