Final answer:
The example of a simile from the choices is 'Her voice was as smooth as silk,' which uses 'as' to compare her voice to the smoothness of silk. Option A.
Step-by-step explanation:
The example of a simile in the choices provided is: "Her voice was as smooth as silk." This sentence uses the word "as" to make an indirect comparison of her voice to silk, highlighting the smoothness of both.
Among the other options, "The room was a canvas of colors" is a metaphor since it directly compares the room to a canvas without using "like" or "as". "Time flowed like a winding river" could also be considered a simile because it uses "like" to compare the progression of time to a river's flow.
Lastly, "His anger burned like a raging fire" is another simile, comparing the intensity of his anger to a fire using "like". Option A.