Why is a lion in the animalia kingdom?

A lion is classified in the Animalia kingdom because it is a multicellular, eukaryotic organism that obtains nutrients through ingestion. Lions are part of the kingdom Animalia due to their characteristics such as being heterotrophic, having specialized cells, tissues, and organs, and exhibiting complex behaviors. Additionally, lions belong to the phylum Chordata within the Animalia kingdom because they possess a notochord, dorsal nerve cord, pharyngeal slits, and post-anal tail at some point in their development.