Landscape listens landscape is being given a human trait. Shadows hold there breath. Shadows are being given a human trait, therefore the Landscape and shadow are being given traits of a person. Simile uses like or as hyperbole exaggerates personification gives personal traits to non people
In literature, an allusion is an "unexplained reference to something or someone outside of the text". The reference is usually to someone or something popular, like Mark Twain.