Which of the following are examples of how the United States government affects the people? (Select all correct)
Aids during emergencies
Creates national parks
Builds ski resorts and theme parks
Passes laws against segregation

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.