A formal region is A. derived from people's sense of identity and attachment to different areas.
B. an area that possesses one or more unifying cultural or physical traits.
C. an area unified by a specific social, cultural, or economic activity.
D. nonexistent in developing nation.​

Short answer/constructed response: respond to the question in 3-5 complete sentences. give details or examples to support your answer. attempt to answer all parts of the question in paragraph form! using the source 1 map, pick two of the 1800's territorial acquisitions you believe were the most important in the development of the united states. provide at least two reasons per territory to explain why you think they were the most important.