F-Stop

http://www.picturecorrect.com/tips/aperture-and-shutter-science-of-the-f-stop/

In this article it explained how to use F-stop and what Aperture was. The article was saying that if the F-stop number was larger then the less light went in. It as well stated that if the F-stop was smaller then more light would be able to be let in. Then it started talking about how to do special effects.

The rule of composition that this picture is using is View point because the view of the picture is Odelle Beckham Jr the one who is catching the ball. All the main focus is on him. Thats the view point.