Answer:
Charlottetown, Prince Edward Island, is the warmest. Sydney, Nova Scotia is the coldest. The larger the negative number the more cold it is while the lower the negative number, it becomes warmer.
Explanation:
Sydney, Nova Scotia
Out of all 3 Sydney, Nova Scotia would be the coldest because -23 degrees is lower than -21 and -22. When using a thermometer the lower it is the colder, so Nova Scotia would be your answer.
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