Final answer:
A simile compares two unlike things using the words 'like' or 'as' to create a vivid image or emphasize a point.
Step-by-step explanation:
The sentence 'Susan's dress color stood out like a sore thumb' is a simile.
A simile is a figure of speech that compares two unlike things using the words 'like' or 'as'. In this sentence, the dress color is being compared to a sore thumb, emphasizing how noticeable and distinct it is.
Another example of a simile could be 'His laughter is like music to my ears', where laughter is being compared to music.
Learn more about Similes