Radio waves.
From lowest to highest it is radio wave, microwave, infrared, visible light, ultraviolet, x ray, and then gamma.
Im assuming that the 2 is a sub of the Al and not the # for O and that u made a type of AL which is Al
its been a while but
Al2O3 + 6HCl = 2ALCl3 + 3H2O
It will change because of the heat
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I believe it is A. The first option