Is Ethereum Classic proof-of-stake?

Could you please clarify for me if Ethereum Classic actually utilizes a proof-of-stake consensus mechanism? I've been hearing a lot about proof-of-stake in the crypto world, but I'm not entirely sure if it applies to Ethereum Classic specifically. It's important for me to understand this as I'm considering investing in this cryptocurrency. Could you enlighten me on this matter? Your expertise in this field would be greatly appreciated. Thank you for your time and assistance.