Study of Composition in Photography

Title: Gypsy boats seen anchored near the ferry pier at night
Technique: Rule of thirds
This is a good example of a photo where the rule third of thirds is used.  The vertical lines and the points of intersection maybe aren't being used to the best of their ability, but they don't really need to be because the two rows of boats and buildings along the warf match almost perfectly with the horizontal guidelines in this image. 

Title: Foreign tourists seen on long beach at sunset on October 19

Technique: Framing
There are times where it is debateable whether or not the technique of framing is being used in a photo due to unplanned framing that happens unintentially or by chance. Sometimes images come in a form of partial framing, but in this photo, that is not the case.  This was obviously skillfully planned by the photographer and shows that he has good command of his/her camera. 

Title: Peruvian peasant plays a trumpet during the Yawar fiesta
Technique: Filling the frame
The man in this image is the dominate subject that fills this frame.  Although there are other men that can be seen standing in the background, not all of their bodies can be seen and some are obstructed by the man's large hat and trumpet.  Although the men in the background are a little distracting, they add to the image and make it more interesting to look at.

Title: Closeup of a donkey

Technique: Point of view
This is an example of a closeup -as the title implies- so although the object fills the frame, I feel that there are other principles of photography at work as well. 

I would say that the point of view is the more dominate principle in this image.  It is a top-down view of the subject and probably required some kind of assistance, either by ladder or some other object to give the camera its desired height. 

The rule of thirds is also being used as the donkey's head seems to be encased by the two imaginary vertical lines.