Fact 1: Vertebrates are animals that have a backbone. Fact 2: Vertebrates generally have a backbone called the spinal column. Given the two facts above, if an animal has a spinal column in their skeletal system what is it called?

pick from the following.
(1). skeletal animal.
(2). vertebrate.
(3). A Greek letter.
(4). invertebrated.
(5). organ.
(6). critical organs.
(7). spined animal.
(8). epidermal.
The answer is:
(2).