Katherine Howell's Three Composition Photos

This is my first composition photo, one I really think is good:
Beach Girl
I love this photo! It has a really clean background, a diagonal line (the beach line) that leads to the subject (the girl). Also, it follows the rule of thirds, because the girl is is the bottom of the first third of the photo. It has a really nice calm moment and I like the muted tones of the picture. Very simple photo, in composition and colors.

This is my second composition photo, one I know is really bad:
Two Dawg Guys
What is up with this picture? It's just a mess. The background is out of control. There's no moment at all. The second guy (on the right) is in some kind of shadow. Also, the photo doesn't focus on anything. I'm not quite sure what I'm looking at.

This is my third composition photo, one I have questions about:
Cargo Plane
I really like this photo, how it's framed with the trees and the sun is peeking out behind the plane. My question is, how do you take a picture where an object is completely shadowed like is this photo?