GENERAL HISTOLOGY

Detailed explanation-1: -Sand is not living, so it doesn’t have any cells. Therefore, the correct answer is sand.

Detailed explanation-2: -Thus, option D is correct that is, Water is not made up of cells.

Detailed explanation-3: -In conclusion, each sand grain investigated in this study was the habitat for around 105 cells representing several thousand species.

Detailed explanation-4: -A littoral cell is a distinct area of the coastline where sand enters the ocean, flows down the coast, and then is removed from the system. Permanent loss of sand occurs at the end of the littoral cell when it flows into a submarine canyon or, less frequently, when it accumulates on shore as part of a sand dune.

Detailed explanation-5: -All living things are made of cells; the cell itself is the smallest fundamental unit of structure and function in living organisms. (This requirement is why viruses are not considered living: they are not made of cells.