This branch's activities can include patrolling shores, performing emergency rescue operations, and cleaning up oil spills?

The Coast Guard is primarily responsible for maritime safety, security, and environmental protection in the United States. Its activities include patrolling shores to monitor and protect coastal areas, performing emergency rescue operations to assist individuals in distress at sea, and conducting environmental cleanup efforts, such as oil spill responses. This unique blend of responsibilities allows the Coast Guard to address various challenges that arise in coastal and maritime environments, making it essential for protecting both human life and marine ecosystems.

In contrast, the Army primarily focuses on land-based military operations, while the Navy concentrates on naval warfare and securing maritime interests. The Air Force is dedicated to aerial operations and defense. Thus, while all branches of the military serve specific roles, the Coast Guard’s remit distinctly includes the activities mentioned in the question.