One day I’m walking and I see kids putting ducks in a tiny little crater in the ground I asked the boy what are you doing you’re going to lose them in the stream at the very end of the Crater in Turn on the corner of my eye so very thin and tiny piece of string tied to him and all the other duckies he said if I die they die we do it together so it won’t matter matter
I believe the answer is idiom, the phrase is not comparing anything so simile and metaphor is out of the question, also personification is giving a non living thing human characteristics.