What is the difference between ETH and Chainlink?

Could you please elaborate on the distinction between ETH and Chainlink for me? I've been hearing a lot about these two cryptocurrencies, but I'm still a bit hazy on their specific differences. ETH, as I understand, is the native token of the Ethereum blockchain, which powers numerous decentralized applications and smart contracts. But what role does Chainlink play in this ecosystem? Is it simply another cryptocurrency, or does it serve a unique purpose within the crypto world? Could you also compare their use cases, market positions, and potential for growth in the future? Your insights would be greatly appreciated.