Final answer:
The stream of consciousness is the narrative technique used for revealing a narrator's thoughts, distinguishing itself from dialogue, flashback, and juxtaposition.
Step-by-step explanation:
Narrative Technique for Revealing Narrator's Thoughts
The narrative technique used to reveal the narrator's thoughts is the stream of consciousness. This technique delves into the internal monologue of characters, providing readers with a direct stream of their thoughts, feelings, and reactions. Unlike dialogue, which shows characters' spoken words, or flashback, which revisits past events, stream of consciousness offers an immediate and continuous flow of a character's mental state. While juxtaposition compares and contrasts different ideas, characters, or actions within a narrative, stream of consciousness focuses on the deep psychological portrayal of a character's mind.