I think you meant "Scent is a smell", not "Scent is a small". You also shouldn't start a sentence with "But", and you left "to" out of your first sentence. That's only the first two sentences. There's more after that, but the point is that if you're going to correct someone, make sure your own post is as error free as you can get it. Everyone makes a mistake occasionally, but your post is full of them.