The subject is the second image is the fence and gate (I didn't even notice the sign you mentioned until later - the lightness and metallic material of the round thing - gate? - on the left is a far stronger visual pull), and I don't think that's what you're going for. Yet, that's the most compelling element in the frame. The first image is simpler and the heavy contrast draws you into the tree. If any editing is allowed, I would clone out the top right piece of the tree because it draws the eye out of the image, but if that's not allowed, it's still the stronger of the two.