Scientists think modern humans migrated along the routes shown on the map. What could explain their movement? A: They moved in search of shelter.

B: They moved in search of tools.

C: They moved in search of food supplies.

D: They moved in search of technology

What geographic feature might have helped rulers unite Upper and Lower Egypt? *

A: The Nile River

B: The Red Sea

C: The Mediterranean Sea

D: The western desert

Overall, countries with a higher literacy rate have a higher GDP per capita than countries with lower literacy rates. *

True or false?

What is the connection between high population growth rates and the percentage of people under the age of 25? *

A: Countries with a lower population growth rates also have a higher percentage of people under the age of 25

B: Countries with a higher population growth rates also have a higher percentage of people under the age of 25

C: Countries with a higher population growth rates also have a higher percentage of people over the age

of 65.

D: Countries with a higher population growth rates also have a lower percentage of people under the age of 25