Final answer:
Teenagers should have the right to vote as they are affected by political decisions and should have a voice in choosing their leaders.
Step-by-step explanation:
One right that teenagers should have but do not currently have is the right to vote. Teenagers, especially those who are 16 or 17 years old, are affected by political decisions and should have a voice in choosing the leaders who make those decisions. Granting this right would encourage young people to become more engaged in the political process and would give them a sense of ownership and responsibility for their future.