Immigration
Immigration explained in an easy to understand way:
Imagine you're hosting a dinner party, and more guests show up than you initially invited. This scenario is similar to immigration, where new individuals enter and become part of an existing population. Just as the extra guests integrate into your party by mingling, sharing food, and adding to the overall atmosphere, immigrants become part of a population by contributing to its culture, economy, and diversity.
Practice Version
Immigration: The United States experienced successive waves of immigration, particularly from Europe. Immigration is when people move from one country to another to live there permanently.