Simile. "They look like white elephants" is a simile because it is a comparison using the word like. A metaphor would say something is something else, alliteration is the repetition of a beginning sound, and personification gives something human-like characteristics.
What are the answer choices ?
Answer: It is the oldest living animal species that has more than one organ. It has no brain. It has no central nervous system. It has no spinal column or bones of any sort.
Explanation:
You think it might be personification?