That question doesn’t show understanding of the relative sizes of atoms and cells.

https://www.thoughtco.com/how-many-atoms-in-human-cell-60388...:

“According to an estimate made by engineers at Washington University, there are around 10¹⁴ atoms in a typical human cell”

⇒ it isn’t necessary to use “multi-cellular” there by a wide, wide margin.

I think you’d have a hard time modeling a single celled organism

Don’t use JS

PHP is webscale.