Question

What would you call an organism whose body is composed of many cell

Answer 1

They are known a Multicellular Organism . that have one or more cell..

I HOPE IT HELP U...

Answer 2

here's your answer looking for

as we can see I huge diversity in our world.
organisms may be made up of single cell may be made up of multi cell.
organism maybe very huge or very small

the organisms whose body is composed of many cells are called as multicellular or metazoans.

example :- dog , Humans, ant etc.

and organism whose body is composed of single cell is called as unicellular.
as their body is made up of single cell so they are microscopic.

example :- ameoba , paramecium etc

hope you are satisfied with my answer