Respuesta :
The correct answer for the question that is being presented above is this one: "migration to Canada, the United States, Australia, and New Zealand,an increase in the use of coal." The following were consequences of rapid population growth in the twentieth century: migration to Canada, the United States, Australia, and New Zealand,an increase in the use of coal
Answer:
3 and 4
Explanation:
1.Warfare
2.The growth of cities
3.Migration to Canada, the U.S, Australia, and New Zealand
4.An increase in the use of coal