Which task is aimed at seizing and securing terrain?

The task aimed at seizing and securing terrain is indeed the attack. This mission involves a coordinated effort to engage and defeat enemy forces, subsequently allowing friendly forces to take control of vital terrain.

In an attack, forces actively engage the enemy to neutralize their defensive positions and establish dominance over the battlefield. By successfully executing this task, commanders can secure critical locations, infrastructure, or resources necessary for future operations. The successful seizure of terrain can provide advantageous positions for further military actions and serve as a basis for extended operations into enemy territory.

This task is fundamental in offensive operations, where the deliberate capture and retention of key terrain enable forces to maintain momentum, consolidate gains, and apply pressure to the enemy. Understanding the broader scope of operations can help clarify why an attack is the correct task specifically designed for seizing and securing terrain.