Image number three, I do love the black and white shack. Image number two, there's too much. Way to busy. And a peaceful image of nature I would doubt to be an image portraying business. Image number one, get the subject out from behind the tree, perhaps croutching down INTO, not merely in front of, the lens with a smarmy look in the face, or just eliminate the girl altogether and make it a picture of a tree.
Focus is more than just image sharpness. Zero in on a clear subject or theme as well. It will make remarks about your photographs move from the 'Ooh, nice' neighborhood to straight downtown 'HOLY WOW! THAT'S GREAT!'