How do governments limit the ability to cross borders?

Answer 1

Governments limit the ability to cross borders through various measures such as visa requirements, Immigration controls, and border security enforcement. They may implement strict documentation processes, requiring travelers to obtain visas or permits before entry. Additionally, physical barriers, surveillance technology, and patrols can be used to monitor and restrict unauthorized crossings. These measures are often justified by concerns over national security, public safety, and the management of immigration flows.