Final answer:
Movement to contact is used as an offensive operation because it allows the attacking force to gain information about the enemy and disrupt their defensive posture.
Step-by-step explanation:
Movement to contact is used as an offensive operation because it allows the attacking force to gain information about the enemy's location, strength, and intentions. This operation involves advancing towards the enemy, making direct contact, and engaging in combat if necessary. By initiating movement to contact, the attacking force can disrupt the enemy's defensive posture, seize the initiative, and dictate the terms of engagement.