This is photo composition, this photo shows framing, by the tree branch framing the image and jack in the background.

 This is a tilt down, a tilt down in photos shows that the person taking it has more power than the person in the photo, like they're looking down upon them, or mostly it shows that the person in the image doesn't have a lot of power like they are very vulnerable.

 This is a example of lines in a photo the way the shadow follows the lines in the grass, everything is mainly going one way.

 This is a tilt up, tilt ups show that the person in the photo has alot of power as they're higher up, like they're looking down upon everything else and the person taking the photo, but sometimes tilt ups aren't very successful as they highlight features such as nostrils making the photo not as elegant. 

This is another example of a tilt up, showing jack has a lot of power by looking down to the camera as though he's higher up than everything else.