There’s are 3 elements: Carbon, Hydrogen and Oxygen
Ethanol consists of 9 atoms:
2 Carbons
6 Hydrogens
1 Oxygen
2 + 6 + 1 = 9 atoms in total
Although the question doesn’t ask for atoms I just wanted to make things clear between them so you don’t get the numbers mixed up. Apart from that, there are 3 elements present in Ethanol.