Final answer:
The excerpt from Frederick Douglass's autobiography demonstrates the use of imagery.
Step-by-step explanation:
The excerpt from Frederick Douglass's autobiography clearly shows imagery. Imagery refers to the use of descriptive language to create a vivid mental picture in the reader's mind. In this excerpt, Douglass uses specific details like crawling into a bag and sleeping on a cold, damp, clay floor to evoke a sensory experience for the reader.
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