What government agency enforces quarantine regulations for vessels entering the US from abroad?

The correct answer is the Public Health Services. This agency plays a crucial role in enforcing quarantine regulations for vessels entering the United States from abroad. The enforcement of these regulations is essential to prevent the introduction and spread of communicable diseases and protect public health.

When vessels arrive from foreign ports, the Public Health Services is responsible for assessing the health conditions on board and evaluating any potential health risks. They can implement measures such as requiring vessels to report any illnesses, conducting inspections, and placing quarantine on ships that show signs of health threats.

In contrast, the other agencies mentioned have different responsibilities: the Department of Homeland Security focuses on border security and immigration enforcement, the Environmental Protection Agency deals with environmental matters and pollution control, and the U.S. Coast Guard primarily focuses on maritime safety and security, as well as search and rescue operations. While they all play important roles in the overall safety and security of maritime operations, it is the Public Health Services that specifically addresses health-related quarantine measures.