Answer:
b. The terrain is mostly desert and mountains
Explanation:
Afghanistan is a country that has proved to be extremely difficult to invade, and that has been the case for thousands of years. There is one major reason for this, the geography of the country. The country is dominated by very high mountains that create rain shadow and and deserts. The mountains themselves are extremely difficult for passing through, and even if they are passed by an invading army, they will take their toll. Once the mountains are passed, an invading army would face desert, very dry climate, very few food sources and very little water, with temperatures varying from scorching hot in the summer, to freezing cold in the winter. So even if an army passes through both of these natural obstacles, when it comes to face the natives it will be too weak to invade.
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B. In the twentieth century alone, the world population grew by more than 5 billion people.
C. Population grew slowly until the eighteenth century because death rates were higher.
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<u>ANSWER </u>–</h3>
Athens and Sparta both used enslaved people, but Athenian men would work with the enslaved people.
In Sparta, there were state-owned slaves called helots. ... In Athens, the lives of slaves were somewhat better. Slaves were privately owned in Athens, and each new slave was welcomed into the family with a ceremony. Slaves in Athens often worked with free citizens, although they were not paid.
<span>The "water table" refers to the level of the groundwater (sometimes also called the "ground water table") below the surface of the earth.</span>