Discuss the Concept of a Dream According to Freud and Adler

Why does a sleeping mind disguise dreams and what is the difference between manifest and latent content, according to Freud? What is the function of dreams and what did Freud mean when he said that dreams were “the royal road to knowledge of the unconscious?” According to Adler, what is the psychoanalytical theory of the cause of nightmares and why does she criticize it?