Final answer:
The narrative technique used to reveal a narrator's thoughts is stream of consciousness, which depicts continuous thoughts and feelings of the character to the reader.
Step-by-step explanation:
The narrative technique used to reveal a narrator's thoughts is known as stream of consciousness. This technique is characterized by a continuous flow of a character's thoughts, feelings, and reactions, often without the typical structure of grammar and punctuation. Stream of consciousness can dip from third person into a character's point of view in a manner that mimics the natural thought processes. For example, Virginia Woolf's writing often employs this narrative style, where readers gain insight into characters' internal dialogues.
A clear instance of stream consciousness can be seen in narrative shifts, where the story might move seamlessly from the exposition of a setting directly into a character's thoughts without clear demarcation. This technique allows the reader to experience the thoughts of the character as they occur, thereby fostering a deeper connection and understanding.
Other narrative techniques such as dialogue, flashback, or juxtaposition do not specifically focus on revealing characters' thoughts in a direct manner. Dialogue involves characters speaking to one another, flashback is a narrative device that takes the story back in time, and juxtaposition refers to placing two elements close together for contrasting effect.