Explanation:

(B) Why sky appears blue :-

(2) Due to reflection

Answer:

(1) Due to scattering

Explanation:

Rayleigh scattering

This phenomenon is called "scattering." The type of scattering responsible for blue sky is known as Rayleigh scattering. Because this effect becomes sharply more pronounced as the energy of light increases, wavelengths at the blue end of the spectrum, where energy is the highest, are scattered preferentially.

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