What are the statements about imagration in he US that are true?

Immigration in the U.S. has historically played a significant role in shaping the nation's Demographics and economy, with immigrants contributing to various sectors, including technology, agriculture, and healthcare. The U.S. has a complex immigration system that includes pathways for family reunification, employment-based visas, and refugee admissions. Additionally, immigration policy is often a contentious political issue, influencing debates on national security, economic impact, and cultural integration. Overall, immigrants have enriched American society while also facing challenges such as legal hurdles and discrimination.