Explain how oceans, seas, or bays affect how people trade in Asia.

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.

i thinl it is the 1st answer

the first forms of writing came from them in the form of pictographs around 3100 bc.