Metaphor directly compares while simile uses 'like' or 'as' for comparison. The line provided represents a simile.
Metaphor is a figure of speech that directly compares two different things by stating that one thing is another. In the line provided, the comparison between gold and tin being put to different uses is an example of a metaphor.
Simile, on the other hand, is a comparison using 'like' or 'as.' It does not assert direct equality like a metaphor does. Therefore, the correct answer to the question is c. simile.
One example of a simile in literature is 'Her smile was like sunshine,' where the use of 'like' indicates a simile, comparing her smile to sunshine.
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