Final answer:
The two groups that can be part of the voting-age population but not part of the voting-eligible population are citizens who have not registered to vote and citizens who are currently imprisoned or have a felony conviction.
Step-by-step explanation:
The two groups that can be part of the voting-age population but not part of the voting-eligible population are:
- Citizens who have not registered to vote
- Citizens who are currently imprisoned or have a felony conviction
While all citizens who have reached the minimum age to vote are considered part of the voting-age population, only those who are registered and meet the eligibility criteria set by their state or jurisdiction are part of the voting-eligible population.