What is it called when they like the flower danced in the breeze?

The phrase you're referring to can be described as "personification," which is a literary device that attributes human qualities or characteristics to non-human entities, such as flowers. In this case, saying the flower "danced in the breeze" gives it a lively, animated quality, evoking a sense of beauty and movement in nature. This technique is often used in poetry and prose to create vivid imagery and emotional resonance.