What kind of figurative language is They stretched in never ending line?

The phrase "They stretched in a never-ending line" employs imagery and personification as its primary forms of figurative language. Imagery is used to create a vivid mental picture of a continuous line, while personification gives the line a sense of life or presence, suggesting an infinite quality. This evokes a feeling of vastness and continuity, enhancing the reader's experience of the scene being described.