Not sure
Animalia is the kingdom that consists only of complex multicellular eukaryotic organisms.
We are multicellular
They are multicellular, complex organisms.
complex multicellular organisms
multicellular organisms
The complexity of body design will increase over evolutionary time. This is the process by which new modifications occur in the organisms. So, in this way we can say that advanced organisms will be complex as compared to complex organisms...
Animalia-- animals
Complex organism generally means multicellular, but in that category there are different levels of complexity. Sponges are multicellular, but don't have distinct tissue, for example. Generally, any living thing that you can see with your naked eye is extremely complex.
In unicellular organisms, reproduction occurs by the division of the entire cell. The modes of reproduction in unicellular organisms can be fission, budding, etc. whereas in multicellular organisms, specialised reproductive organs are present. Therefore, they can reproduce by complex reproductive methods such as vegetative propagation, spore formation, etc. In more complex multicellular organisms such as human beings and plants, the mode of reproduction is sexual reproduction.
Zygote is the fertilized cell that grows into a multicellular organism in sexual organisms.The embryonic germ layer divides and differentiates into the complex multicellular organism.
There are two answers to this simple but complex answer, but the answer is fugi and animilia. They are both multicellular and heterotrophic.
If you are referring to organization of complex multicellular organisms, then level of organization can be as follows: cell>tissue>organ>organ system>organism