Which term refers to people who use products, but who might not have purchased them?
a. customer
b. consumer
c. manufacturer
d. designer

B. Consumer.

A customer is someone who actively purchases the product, a manufacturer is someone who makes the product, and designers are people who design the product.

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.

the answer is a) the proclamation of 1763.