Answer:
the designation of electoral districts based on population rather than other
factors
Step-by-step explanation:
Reapportionment is the designation of electoral districts in the United States House of Representatives using changes in population as a factor.
For instance, if a city in the United States had a double increase of population over a period of 10 years and the House is not reapportioned, then the number of people the congressmen are representing will be more than if they are reapportioned.