Codes of Chicalry is a code of conduct associated with the medieval institution of knighthood.
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No, it’s a similie because it consist of the word like and your comparing the shine to dark mirrors just remove the word like and it would be a metaphor
Please refer to the attachment for the explanation and answers to your questions.
Bravery because the ice is thin and body know if they are going make or not so they are taking a chance