Which subdivision of the animal kingdom encompasses all others listed?

The subdivision that encompasses all the others listed is Eumetazoa. This group includes all animals that possess true tissues and are organized into germ layers—specifically, animals that have a level of complexity beyond simple cellular organization. Eumetazoa is a broad category that includes all modern animals except for the most primitive forms, such as sponges, which lack true tissues.

The other options—Bilateria, Deuterostomes, and Coelomates—represent more specific groupings within the animal kingdom. Bilateria refers to animals that exhibit bilateral symmetry, which includes a vast majority of animals but is not inclusive of all. Deuterostomes encompass a group of animals that includes echinoderms and chordates, characterized by their embryonic development patterns. Coelomates describe animals that possess a coelom, or body cavity, a characteristic found in various groups but not universal across all animals.

Thus, Eumetazoa serves as the unifying group that includes all higher animals with tissue organization, making it the most inclusive choice on the list.