Using complete sentences, compare and contrast the characteristics of a metropolis and a megacity.

Both a metropolis and a megacity have large populations. A megacity is larger, with a population near or above ten million, while the population of a metropolis might range from 500,000 to several million. The term "megacity" refers to the world's largest cities, like New York, Los Angeles, Rio de Janeiro, and Tokyo. Both a metropolis and a megacity have a major impact on their surrounding regions, and both include cities and suburbs in the surrounding regions.