yes because if we discover them we can then find ways to make it safe
Your answer would be:
US citizens are required to (options not shown). (Voting) is a privilege that only US citizens can exercise, but it is not required.
hope this helps :)
For the answer to the question above, The point of view you use to to write a description is mental as well as emotional.
i hope my answer helped you. Feel free to ask more questions. Have a nice day!