Answer: D Ancient Americas
Explanation: Ancient America was home to sophisticated civilizations such as the Maya, Inca, Olmec and Aztec societies, and mysterious ruins like Chichen Itza, Teotihuacan, Serpent Mound, Tikal, Machu Picchu, and the Nazca Lines.
BRAINLESS PLEASE
It was challenging because there wasn't many tools then and not a lot of relying resources. As early new England was developing, some crops would die off from livestock eating it, and lack of knowledge of what they were farming. This was some major things in the development of new england's agriculture.