Overcrowding and slums developed in many impoverished countries in the 20th century, mostly due to large migrations to cities from people looking for work.
Droughts: Droughts are usually caused by high temperatures and to super dry weather
Answer:Geographic featured that acted as norther borders of the Roman Empire at its height were: Rhine River, Danube River, Carpathian Mountains, and the Black Sea.
Answer:
5A: Northwest Region: Rocky Mountains
2B: West Region: Great Basin Desert
4C: South West Region: Grand Canyon
3D: Midwest Region: Great Plains
6E: Southeast Region: Everglades
1F: Mid-Atlantic Region: Many bays and good harbors
7G: Northeast Region: Rocky coastline and small coastal islands
Explanation:
