Question

name the thing which looks green in the morning, black in the noon, blue in the evening, white in the night

Answer 1

The thing that looks green in the morning, black in the afternoon, blue in the evening and white in the night is algae.

Algae are aquatic living beings which live together in a gathering. They have the green pigment which allows them to perform photosynthesis.

A particular kind of algae lives on the surface of the water in vast majority and look green in the morning.