Researchers have identified precisely 4,500 languages in the world. true or false?

Which of the following is an advantage of pure capitalism

Explain the popular saying "we are made of stardust. how are we made of stardust? use scientific vocab.

A. describe the model of urban structure most often observed in mega-cities in developing countries. explain how this model differs from common urban structures in north america. b. describe at least two factors leading to the growth of mega-cities in developing or least-developed countries. c. identify and explain two factors that led to the formation of squatter settlements in mega-cities in developing countries.