Which activity is an obligation for U. S. citizens? report for jury duty
enlist in the military
vote in national elections
volunteer in the community

report for jury duty

Explanation:

jury duty requires you by law to show up unless you have a good reason not to.

the other options do not require you to do by law.

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so. 

southerners, for their part, considered brown a terrorist. they felt threatened by northerners' deification of brown and worried about the potential for other, similar armed insurrections.

explanation: