At what temperature does aluminum begin to melt?

Aluminum begins to melt at a temperature around 1,220 degrees Fahrenheit (660 degrees Celsius). Therefore, the correct response aligns with the choice indicating 1200 degrees. This temperature is crucial for fire investigators to understand, as aluminum is commonly used in various construction and mechanical applications. When aluminum melts, it can alter the structural integrity of a building or object, providing critical information regarding the fire dynamics.

The other temperature options fall below the melting point of aluminum, making them unsuitable for accurately representing when aluminum transitions from solid to liquid form. Understanding these temperatures is essential in fire investigations, especially when evaluating materials affected by fire and assessing potential causes and effects of a fire incident.