The cost to replace an improvement with original materials is known as

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.

an era of negotiation.

is that an answer to your question?

religion was the center of there society they practiced human sacrifices and which they believed kept there god strong and that he would keep bad guys away hope this

he killed his so.