A border control agency functions primarily to manage and regulate the flow of people and goods across a country's borders. It ensures compliance with immigration laws and enforces customs regulations, playing a critical role in national security. These agencies are responsible for preventing illegal crossings, smuggling, and human trafficking while facilitating legitimate travel and trade. Moreover, they often collaborate with international counterparts to address cross-border challenges. Effective border control is essential for maintaining sovereignty and protecting economic interests, while also balancing humanitarian concerns related to asylum seekers and refugees.