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Answer: C (Aluminum)

Explanation:

Aluminum would require the least amount of thermal energy to melt, because according to the chart, it has the lowest melting point (1218ºF) as compared to the melting points of Gold (1945ºF), Nickel (2646ºF), and Steel (2500ºC).
aluminum it has the least melting point so it’s aluminum. just look and see which is the lowest number