World Geography
Which among the following factor/factors have led to the extensive development of dairy farming in the dairy belt of North America?Hot and humid climateRainfall varying between 55 and 125 cm.Select the correct code from the options given below:

Neither 1 & 2
Only 2
Both 1 & 2
Only 1

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

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

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