What is the basic working principle of direct solar dryers?

Question

Options:

A . Direct exposure of substance to fire

B . Direct use of sunlight to start a heater which is then used to dry the substance

C . Indirect exposure of substance to sunlight

D . Dehydrating the substance by directly exposing to sunlight

Answer: Option D
Answer: (d).Dehydrating the substance by directly exposing to sunlight

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