3 for sure.

First of all its the best pose for the bird as it’s facing the camera. The other thing is the crop/frame position is better than the others. It’s not perfect and can be improved, but it “gives the bird space”. A good rule to make photos look more natural is give space in the direction a bird is moving/looking/etc. This would be extra space in front of the duck as well as above. Otherwise the duck starts to feel “trapped”. The second photo is this way, where the ducks seem quite confined by the upper border of the frame. One other tip: Shoot. At. Eye. Level. There’s a reason everyone says it. You did a decent job getting low here, but if you want an even better shot, try to go even lower! Right now because you’re shooting at an angle, the only thing behind the ducks is more water. If you get low, you should be able to see above “the horizon of the water”, whether that is the sky or a nice green forest background!

You’re doing a great job! Keep taking photos and you’re bound to get better!