Final answer:
Early civilizations in South America took shape along the coast and in the Andes region. They were known for their advanced architectural structures, mathematical systems, written language, agricultural practices, and unique artistic and religious traditions.
Step-by-step explanation:
Early civilizations in South America took shape in various regions. Along the coast, civilizations such as the Olmec, Mesoamericans, and Chavín culture developed. These civilizations were known for their advanced architectural structures, mathematical systems, and written language. In the Andes region, civilizations like the Moche, Nazca, Tiwanaku, and Inca emerged. These civilizations had impressive agricultural practices, complex societies, and unique artistic and religious traditions.