Final answer:
Option (D), An immigrant is a person who moves permanently to a new country, not merely someone who travels for leisure or works abroad temporarily.
Step-by-step explanation:
An immigrant is an individual who moves permanently from one country to another. This definition falls within the broad category of migration, which is the process that involves movement from one place to another to reestablish a household, whether temporarily or permanently. Hence, immigrants are not simply travelers or temporary workers; they are people who relocate to different countries with the intention of setting down roots and integrating into their new society.
They might do so for various reasons including economic opportunities, family reunification, or escaping adverse conditions in their home countries. Immigration can involve extensive preparation, such as gathering important documents, learning the new language, and understanding the culture and job market of the destination country.