What are the primary objectives of amphibious operations?

Amphibious operations are designed to combine naval and ground forces in a coordinated effort to achieve strategic military objectives. The correct choice highlights the primary goals that these operations aim to accomplish.

Projecting force means deploying military capabilities to a specific area, often with the goal of being able to engage in combat operations or to deter potential threats. Seizing territory is critical in establishing a foothold in a new area, which is essential for any further military endeavors, including offensive operations or establishing bases for logistic support. Establishing presence refers to the act of showing military capability and commitment in a region, which can have both deterrent effects on adversaries and reassure allies.

The other choices encompass important components of military operations but do not capture the essence of what amphibious operations primarily aim to achieve. Deploying air forces and providing logistical support are indeed important but are more supportive roles rather than primary objectives. Establishing communication lines and acquiring aerial supremacy are also crucial aspects but typically fall under broader operational objectives rather than the specific goals of amphibious operations. Gathering intelligence and conducting reconnaissance missions are vital for operational planning and situational awareness but do not directly reflect the core purpose of projecting force through amphibious landings.