Final answer:
Redistricting is the process of redrawing congressional districts to match population shifts in states with more than one representative. Gerrymandering refers to the intentional drawing of district lines to give advantage to one group or party.
Step-by-step explanation:
The process of redrawing congressional districts to match population shifts in states with more than one representative is called redistricting. Redistricting is necessary to ensure that districts have relatively equal populations and meet the requirements of the Voting Rights Act. Gerrymandering, on the other hand, refers to the intentional drawing of district lines to give advantage to one group or party.