Settlements that have populations in excess of 10 million people and that connect their countries and regions to the world economy are called
a. small cities
b. megacities
c. megalopolises
d. suburbs

The second alternative is correct (B).

The megacity is a concept created by the UN to designate all the cities of the world that have a population of more than 10 million inhabitants. That is, the concept of megacity is related to population density.

Note: A megalopolis is a socio-spatial and population axis that connects two or more metropolis or megacities. For example, the Boston-New York megalopolis.  Thus, a megalopolis most likely presents one or more megacities, but not every megacity forms around itself a megalopolis.

i would say b. research typically uses a variety of sources

answer; john locke;