Final answer:
Diagram B best explains how American Indian cultures were shaped by their environments before the arrival of Europeans.
Step-by-step explanation:
The diagram that best explains how American Indian cultures were shaped by their environments before the arrival of Europeans is diagram B.
This diagram shows that the environment factors such as hot weather, climates suited to farming, mountains and rivers, and dangerous coastlines had specific causes and effects on American Indian societies.
For example, hot weather and climates suited to farming led to the development of complex civilizations, while mountains and rivers led to societies based on hunting and gathering.
Learn more about American Indian cultures and their environments