Swallows fly high and fast, with feathers like clothes and tails like scissors.
Elephants are tall and big, with a body like a wall and legs like four pillars. This sentence is a metaphor.
Metaphor, in layman's terms, is to make readers understand what you are saying. Say a very ordinary thing a little differently. To be different is to compare what should not be. Use an alternative and vivid sentence for analogy. Such a sentence is a figurative sentence.
In this sentence, the elephant's body is compared to a wall, and its four legs are compared to pillars, indicating that the elephant is tall and strong.