What type of ambush allows for quick, spontaneous action?

A hasty ambush is characterized by its quick and spontaneous execution in response to an immediate opportunity. It is typically set up rapidly by the forces involved, often with little to no prior planning, taking advantage of the element of surprise as an enemy force approaches or is detected. This type of ambush is effective because it requires minimal preparation time, allowing units to react to unfolding situations on the battlefield swiftly.

In contrast, the other options like deliberate ambush refer to more planned operations that require thorough reconnaissance and setup before execution. A surprise ambush, while it emphasizes the element of surprise, may not necessarily be conducted spontaneously as it can also involve detailed plans to ensure effectiveness. Covert ambushes involve secrecy and are often used to hide the ambushing forces, which may not be aligned with the idea of immediate response. Therefore, hasty ambushes stand out for their emphasis on rapid action and immediate deployment against the target.