Cultural Centers of the Americas

Identify at least two means of communication used by the ancient American civilizations  (Olmec, Maya, Aztec, Inka, Nasca). Then, compare and contrast (differences and/or similarities) their functions in their respective societies? Discuss whether there are any features they have in common? Explain. Next, describe how the ancient American means of communication have evolved in the modern society. 

Please elaborate by writing at least two well-developed paragraphs of at least five sentences each.