This is most likely a Metaphor. Its definitely not a Onomatopoeia and probably not a Assonance.
Answer:
mystical journey of a young boy called Billy who falls from a tree house and lands into a place where he meets gnomes.
Explanation:
"The Tree House" by Jaclyn Einis narrates a mystical journey of a young boy called Billy who falls from a tree house and lands into a place where he meets gnomes.
Billy who had already heard stories about gnomes from his grandfather didn't know what was going on when he actually meets them. However, he remains calm and enjoys their company.
The gnomes gifts him a garland made of dandelion flower and leaves and place it on his head. They advice him to always remain cheerful by saying that life was full of surprises.
Then he suddenly finds himself lying down on the forest ground and that the tree house on the tree top was gone. He returns home confused and puzzled until he finds that the garland was still on his head.
