**Identify the features that distinguish animals from organisms in other multicellular kingdoms.***Choose all that apply*- [ ] There are no cell walls in animal cells- [ ] Animals undergo gastrulation in embryo formation- [ ] All animals are motile- [ ] Animals are ingestive heterotrophs

The animal kingdom is very diverse , but animals share many common characteristics, such as methods of devopment and reproduction. All animals are eukaryotic, multicellular organisms and most animals have complex tissue sturcture with differentiated and specialized tissue. The animal classification system characterizes animals based on their anatomy , morphology , evolutionary history, features of embryological development and genetic makeup. This classification scheme is constantly developing as new information about species arises. The correct answer is option D which says Animals are ingestive heterotrophs . A heterotroph is an organism that cannot produce its own food, instead taking nutrition from other sources of carbon , mainly plant or animal matter. Animals are ingestive heterotrophs which means bring food inside, secrete chemicals internally, the absorb particles into body fluids. Other multicellular organisms are absorptive heterotrophs. This is the only feature which distinguish animals from organisms in other multicellular kingdoms . Because there are other multicellular organisms which do not have cell wall, which are motile and undergo gastrulation in embryo formation.