Final answer:
Elephants are the animals characterized by white ivories and a long trunk, and they are part of the Chordata phylum, which is known for its diverse class of animals with a backbone.
Step-by-step explanation:
The animals with white ivories and a long trunk that you are referring to are elephants. Elephants are not only known for their distinctive trunk and tusks (often called ivories), but they are also part of the Chordata phylum, which includes animals with a backbone. In addition to having a backbone, elephants, as mammals, have hair, produce milk, and are warm-blooded. They belong to the largest class of animals that exhibit great diversity in body forms.