The same who that tells you when you do something wrong.
I'll think about it.
Eve did not know she was naked when she ate the fruit as her eyes were not opened until the man ate the fruit. When their eyes were opened then they knew evil.
I don't know how you can be so sure about that. Why not each as soon as they ate had their eyes opened?
Insisting from the text that the opening of the eyes had to wait until both had eaten, is at best, speculative.
The only being that convicts anyone of anything is the Holy Spirit.
No ICANT. The Devil also accuses the conscience.
Now the Holy Spirit is God. God said
"Who told you that you were naked?" So God is not the best choice, IMO in that passage. However I would not argue that God does of course convict of man's sin.
The Devil as the Accuser of the brethren is a possibility. He wants always to separate man from God and God from man. It is typical of the Devil to accuse -
"Hey Adam and Eve, did you know you guys are naked? Better run away from God. Quick, I know a couple of good trees you can hide behind."
Just musing here. I have no firm opinion on it yet.
The trigger was man willfully disobeying God. He chose to eat the fruit. He was not deceived by the serpent. The woman gave him the fruit and he chose to eat it knowing what it was.
I personally believe the man chose to eat the fruit and die with the woman as they were one. Genesis 2:24.
That does make for a great romantic love story, I must admit.
Probably though, Adam should have said "Sweetie, you're on your own this time."