Answer:
The correct option is, Ant, bacteria, and fir tree are composed of one or more cells.
Explanation:
All living things are made up of living cells. Single celled organisms are organisms which are made up of only 1 cell. Example; Bacteria. While an organism made up of different organ systems to perform various functions and are made up of more then one particular cell. They are also called multicellular organisms.
Note:
Cell--> Tissue--> Organ-->Organ System-->Organism