Radiolarians have a cell wall made of

Radiolarians have a cell wall made of
According to
 https://microbewiki.kenyon.edu/index.php/Radiolaria
"
Radiolaria are unicellular organisms. They have mineral skeletons (tests) that are composed of silica. The tests are formed through the absorption of silicon compounds. This skeleton is covered with cytoplasm, which is withdrawn if the organism is disturbed."
There cell wall is made of according to another website
...
 "Radiolariahave cell walls made up of thick cellulose walls"
Hope this helps:)
@SamSamySamantha

Hi There the correct answer to this Warm air can hold a lot of water vapor. ... In fog, tiny droplets of water rise and sink, carried by currents in the air. Sometimes the droplets fall to the ground like rain, but new drops condense out of the air to take their place. Droplets grow bigger as more and more water molecules collect together.

Hope it helps!