Fact 1: Absorbing energy causes objects to heat. Fact 2: Students test the effect of a magnet on various metal objects. Given the two facts above, what causes metal to heat?

[+] hydrogen and oxygen;
[+] electromagnetic energy;
[+] electricity;
[+] cooling nearby things;
[+] growth;
[+] absorbing energy;
[+] releasing energy;
[+] rays or beams;
Answer:
absorbing energy