Answer:
metaphor
Explanation:
They are using a form of imagery in this phrase. The train carts are not literally ice cubes bobbing up and down. It's used to help the reader imagen the scenario. Always refur to a "sentance/quote" as a 'phrase'. And use things like further more and moreover to get yourself good grades. Good luck
Because Pony was scared that they would split them up. He didn't want to be split up because they were family, and he didn't want to go to the home and lose his family.
