How has population growth affected global societies during the 20th and 21st centuries

C) it has led to overcrowding in many parts of the world.

Explaination:

Population growth has affected global societies during the 20 and 21st. century in that it has led to overcrowding in many parts of the world. Globalization has brought many benefits to the economy of countries but also has had many consequences such as the overcrowding in many parts of the world. This also brings about other problems such as air pollution, lack of services in many parts of larger cities, rural immigration to urban cities in searching for better living conditions, rise or crime, among others. Overcrowded areas in places like Los Angeles, New York, Chicago, or abroad such as Mexico City, Beijing, Tokyo, and Buenos Aires, Argentina, are clear examples of overcrowded places.  

d. because in realality people do wanna buy things and when an item is sold alot the makers make the price least   thats what my gut saya lol