What is a distinguishing characteristic of surrealism as seen in the persistence of memory by salvador dali?

I believe the correct answer is: A dream scene inspired by the artist's subconscious mind.

Surrealism was the movement inspired by the Breton’s thought that artists should paint "outside all aesthetic or moral preoccupation", influenced by the catastrophic First World War. The main characteristics were bizarre, erotic depictions, inspired by subconscious of human mind. This characteristic is seen in "The Persistence of Memory" by Salvador Dali, for which he says that it came from a dream, inspired by the his subconscious mind.