Rousseau's ideas of "natural law" led to his publication of the social contract in 1763. his writings reflect enlightenment ideals because he desired
a) greater rights for common people.
b) harmony between faith and reason.
c) a return to the primacy of the catholic church.
d) a rebirth of the classical ideals of greece and rome.

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.