All organisms in kingdom animalia are multi cellular, meaning their bodies are composed of more than one cell.

which other characteristic is common to organisms in kingdom animalia

a. they all have a backbone.
b. they all take oxygen through their gills.
c. they all need to get food from outside source.
d. they are all able to survive in water.

C. They all need to get food from an outside source.

They do not all have backbones, take oxygen through their gills, or are able to survive in water. Some have some of these characteristics, but not all of them.

In Animalia kingdom the organisms need to get food from outside source.

Option: C

Explanation:

All organisms in kingdom Animalia are heterotrophic in nature which means that they cannot make their own food by themselves. Plants are autotrophic i.e., they prepare their own food through photosynthesis but organisms in Animalia either ingest or eat other organisms. So, there mostly depends on the outside source for their food. These organisms are multi cellular which can prepare their food from the outer source.

d.) continue to rise rapidly

no because it could make the world a terrible place to live in.