Which Was the First Region of High Population Density That

question 90

Multiple Choice

Which was the first region of high population density that appeared about 9,000 years ago?

• A) Indus valley
• B) Tigris valley
• C) Euphrates valley
• D) Area stretching from Greece to Iran, including Egypt
• E) Both B and C

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Definitions:

Frequency

The number of cycles completed by a sound wave in one second, determining the pitch of the sound; expressed in the unit called the hertz.

Researchers

Individuals who conduct systematic investigations to establish facts or principles or to collect information on a subject.

Heterosexuality

A sexual preference that involves being romantically or sexually attracted to people of the opposite gender.

Homosexuals

Individuals who are sexually attracted to members of the same sex.