Answer:
C. mushrooms. Multicellular organisms are organisms made up of multiple cells that work together to perform functions and carry out activities. An example of a multicellular organism is a mushroom, which is composed of many cells that work together to form the visible fruiting body. In contrast, bacteria and amoebas are single-celled organisms, and yeast is a type of fungus that can exist as single cells or in a multicellular form.