Question

what do ypu mean by diatomaceous Earth?briefly
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Answer 1

Answer:

it is thing which is accumulated in the large amount in the deep sea and which play as a pigment in the sea

Answer 2

These are chrysophytes that are found in fresh water as well as in marine too.
Most of them are photosynthetic
It consists of thin overlapping shells in which the walls turn indestructible
These layers of diatom that leftover billions of years are known to be diatomaceous earth