Which is a shared characteristic of all animals?

a)
are unicellular

b)
are vertebrates

c)
are invertebrates

d)
are multicellular

Its is D

Explanation:

These tiny organisms are unicellular, composed of only a single cell. The familiar plants, animals and fungi that we can see represent only a tiny fraction of life on Earth. These organisms, being made of more than one cell, are called multicellular

b. the carbon cycle ensures living things have a source of hydrogen