Answer:
C
Explanation:
Roads can vary in elevation, since a road is essentially any path to walk on.
Hills have varying elevations - they are higher at certain points.
Rivers can flow downhill and aren't always at equal elevation.
Contour lines on a topographical map connect points of equal elevation. If you were to follow a contour line while walking, the elevation would remain constant.
Geography do 10 questions from pages 159 to 164.
The Heart of Islam is on the Arabian Peninsula - which is in Asia, so this is not the correct answer.
Human species is believed to have evolved in Africa - and because of this it is often called "the cradle of civilization"- so the correct answer is d)
Human history begins with written texts - which are more associated with Asia.
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Geography uses other subject in it's studies. Very close to geography are geophysics and geology. Geophysics studies quantitatively physical phenomena of the planet Earth, geology studies composition of soil rocks and their development through history. Geography uses biology, statistics, mathematics and other subjects in order to better describe the Earth.