I agree with JAC, especially about the first shot. The second one is muddled and seems as though some of the flock is getting cut off, oh no!
The third shot I really like for reasons why we like art. It's line and implied movement. The first thing that strikes me is the framing. How fun! But, what I think is really neat is how the positions of the people contrast their surroundings. It's kind of an ugly place. There's graffiti on the wall and litter on the ground, but they're having a great time "apart" from it (because they're jumping) against a pretty blue sky.
My favorite thing about the shot, though, is how the third person is facing a different direction and in a pose that changes the "rhythm" of the first two people. It's beautifully simple rhythm: "same, same, different" or "1,2, spin." They also get progressively lower from left to right so there is an implied diagonal line cutting across a lot of parallel lines of the shot. I suspect that this was a happy accident. But, that's what we do, we create circumstances for capturing our surroundings and it's art.