In the reaction, 3cu + 2al3+ → 3cu2+ + 2al, which substance is being oxidized?

In this reaction, Copper is the element being oxidized because it is losing electrons. It starts with a neutral charge (0) and ends up with a 6+ charge. Because its charge is increasing, it is being oxidized (losing electrons).

The image seems to be behind the mirror, but nothing is really there.just took the test.