Is DAI backed by ETH?

I've heard quite a lot about DAI and its relationship with Ethereum, but I'm still a bit hazy on the details. Could you clarify for me if DAI is indeed backed by ETH? I've read that it's a stablecoin, but I'm not entirely sure how the backing mechanism works. Is it similar to how other stablecoins are collateralized? Or does DAI have a unique approach? I'm particularly interested in understanding the role of ETH in this process and how it ensures the stability of DAI. Could you please elaborate on this?