Which of the following is characteristic of political borders? mountains
man-made
easily changed
determined by culture

i would say mountains

Explanation:mountains to divide to

the countries which is a key feature

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.

where is the cartoon dude