As the u. s. economy has developed, what trend is apparent in modern times?

Thank you for posting your question here at . I hope the answer will help you. Feel free to ask more questions.
Fewer people live in rural areas than in the 1800s. 
People have a greater dependence on steam power. 
People have a greater dependence on renewable resources. 
Fewer people live in urban areas than in the 1800s.

THe answer is Fewer people live in rural areas than in the 1800s. 

None of them. they are likely to occur on any plate boundary

Humans have survived and thrived in mexico city by using technology to create greater access to land. when the spanish conquered the aztec capital, tenochtitlan, in the 16th century, they built mexico city by draining the lakes and filling in the lake water to create more arable land for agriculture. this technique of land reclamation has continued to be fundamental to human civilization in mexico city.