* Multicellular organisms are made up of many cells that work together to form tissues, organs, and organ systems.

* Hedgehogs are complex animals with specialized cells, tissues, organs, and organ systems, just like humans and other animals.

* They have a brain, heart, lungs, digestive system, and other vital organs that wouldn't be possible without multiple cells working in unison.

So, a hedgehog is definitely not a single-celled organism like bacteria or amoeba. It's a complex, multicellular life form.