Hurricane: a type of storm called a tropical cyclone, which forms over tropical or subtropical water.
The ocean water evaporates caused by heat from the sun. The evaporating water forms a cloud of warm, moist air that moves upward. Then, as the warm, moist air rises, more air rushes into replace it.
Hurricanes form near the equator over warm oceans.
Tornado: a mobile, destructive vortex of violently rotating winds having the appearance of a funnel-shaped cloud and advancing beneath a large storm system.
Most tornadoes form from thunderstorms. You need warm, moist air from the Gulf of Mexico and cool, dry air from Canada.
The Inca Empire was said to have lived in the Andes Mountains which is in South America.
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Agriculture is by far the single most important economic activity in Africa. It provides employment for about two-thirds of the continent's working population and for each country contributes an average of 30 to 60 percent of gross domestic product and about 30 percent of the value of exports
Illustrate has a couple of meanings. First, illustrate means to explain something with pictures, charts, etc. Second, illustrate means to state as an example of something.