Final answer:
Rivers in the Coastal Plains significantly contributed to the ease of life for Native Americans by providing fresh water, food through fishing, and means for agriculture, trade, and transportation.
Step-by-step explanation:
The physical characteristic found in the Coastal Plains that would have made life easier for Native Americans is C. Rivers. Rivers played a crucial role in the sustenance and development of Native American societies. With an abundance of fresh water, these water bodies allowed for the establishment of permanent settlements.
Settlements thrived along rivers due to the availability of water for agriculture, fishing, and transportation. Rivers provided the means to sustain crops, which was essential for a sedentary lifestyle. Moreover, fishing also became a reliable source of food, contributing to a rich and diverse diet.
Apart from sustenance, rivers were also instrumental in trade and communication. They enabled tribes to travel and exchange goods, which is a fundamental aspect of any growing society. Thus, the presence of rivers in coastal plains greatly aided Native Americans in developing a stable and flourishing community life.