do not send the KYC, Thanks for the warning.
Not the KYC, private key is what gives them access to your wallet.
i stop when they ask for the sign eth address,thanks for the warning
Eth address is not controversial here, Airdrops do usually require your Eth address to send the tokens to your wallet, unless they store your tokens in the wallet on their site/platform. It's the private key you should never give to anyone.