1The mass migration of refugees from the war-torn country has put a strain on the neighboring nation's resources.
2What are the main factors driving the migration of young people from rural areas to cities in search of better job opportunities?
3The migration patterns of certain bird species are closely monitored by conservationists to understand the impact of climate change.
4The government has introduced new policies to regulate the migration of workers from other countries and protect the rights of native citizens.
5Historians have long studied the migration of ancient civilizations to understand the development of modern cultures and societies.