What is urban sprawl, and how does it occur?

Responses may vary but should include some or all of the following information:

As cities grow, suburbs move farther and farther away from the city center. Most people would rather live in homes with yards than in high-rise apartments. As population increases, these homes must be constructed farther away, so the city grows out instead of up.

Explanation:

question

which are human systems?

the amazon rain forest

the appalachian trail

the george washington bridge

the himalayas

the hoover dam

the north american free trade agreement