Let's just review those verses and look at what it says. First of all, the Lord appeared and Abraham saw Him with his eyes and what did He look like? He looked like a man. But it was the Lord because Abraham bowed down and worshipped Him and He didn't reject the worship.
In verse 4, Abraham said, "Let a little water be brought, and wash your feet." God has feet. "And I will bring a morsel of bread." We find that God took the bread and the meat and the three of them ate. He spoke, so He had a voice and He conversed with them. That's pretty clear.
