According to European commission immigration is defined as an action by which a person from a non-European country starts residing in the territory of an EU country for a period that has to be at least 12 months.
Step-by-step explanation:
Immigration policies are a concern in Western Europe because
- Immigrants dilute European culture
- Immigrants increase the threat of terrorism as ISIL millitants enetr as refugees
- Immigrants take jobs away from "natives"