World Geography
Which among the following principle is used by Bats?

SONAR (Sound Navigation & Ranging
law of reflection
RADAR (Radio Detective & Ranging
law of diffraction

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World Geography
The Harmattan is

All of these
tertiary wind that carry great quantities of fine dust from the Sahara
wind that blows during the dry season from December to February
cool, extremely dry wind that forms over the Sahara and blows westward or south-westward to the Af

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