Which of these elements are key characteristics of political boundaries in the united states? select three options.

they are set by the government.
they are created by cultural norms.
they form outlines of states, cities, or regions.
they are determined by significant historical events.
they have exact measurements that may include natural landforms.

They are set by the government, they form outlines of states, cities, or regions, they are determined by significant historical events

Explanation:

it is due to the halo effect as the impression of the boy created earlier.on the mind of the principle affected his decision

ne pare rău, dar când mi-am căutat întrebarea, doar avioanele au apărut .. deci, ar putea fi răspunsul, sau ar putea fi baloane cu aer cald, deoarece acestea pot conta și ca ambarcațiunile de aer, dar nu sunt complet sigur de asta. a fost doar o presupunere, sper că am ajutat, îmi pare rău dacă nu am făcut-o. de asemenea, folosesc traducerea google, pentru a traduce ceea ce spun în engleză, așa că îmi pare rău dacă gramatica sau chiar limba nu este corectă