Which federal agency is responsible for enforcing customs laws in the United States?

The U.S. Customs and Border Protection (CBP) is the federal agency responsible for enforcing customs laws in the United States. This agency plays a vital role in safeguarding the nation's borders and facilitating lawful trade and travel. Specifically, CBP is tasked with the regulation of incoming goods, ensuring compliance with customs regulations and laws, preventing illegal smuggling, and collecting tariffs and duties.

CBP employs a comprehensive approach to customs enforcement, which includes inspecting cargo, conducting security checks, and implementing policies to enhance trade compliance. Additionally, the agency collaborates with other federal, state, local, and international entities to uphold trade laws and regulations, making it integral to U.S. customs enforcement operations.

In contrast, the Federal Trade Commission (FTC) primarily focuses on protecting consumer rights and promoting competition. The Department of Transportation (DOT) is concerned with transportation infrastructure and policy rather than customs enforcement. The International Trade Administration (ITA) works to promote U.S. trade and investment, but it does not have enforcement authority over customs laws. Therefore, the correct answer highlights CBP's essential role in enforcing customs law in the United States.