Animals:

* Humans

* Dogs

* Cats

* Birds

* Fish

* Insects

* Worms

* Sponges

* Jellyfish

Plants:

* Trees

* Flowers

* Grasses

* Mosses

* Ferns

Fungi:

* Mushrooms

* Molds

* Yeasts

Other:

* Algae (some are multicellular)

What makes them multicellular?

Multicellular organisms are composed of many cells that work together to form tissues, organs, and organ systems. This allows for greater complexity and specialization of function compared to single-celled organisms.