The Desertification of the Sahel Is Caused By

question 33

Multiple Choice

The desertification of the Sahel is caused by:

• A) overgrazing.
• B) overcultivation.
• C) periodic droughts.
• D) soil erosion.
• E) All of these choices are correct

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Definitions:

Expression

A combination of symbols and operators that represent a value or concept.

Positive Exponents

Indicate how many times a number, the base, is to be multiplied by itself.

Expression

A combination of symbols that represent values or operations in mathematics.

Z

Often represents a variable in mathematics or denotes the set of all integers in number theory.