Rhythm is a principle of composition. Good photos will often have Elements that are REPEATED and ECHOED off each other in the photo.
In this photo of a city, I see multiple people walking down the streets with multiple buildings in the background. The Rhythm , can be seen in the People, Buildings, and multiple sidewalk lines. This Rhythm conveys a sense of union in my opinion. This image is appealing to me because the picture has a certain beat or tune to it due to all these elements coming together.
In this photo of a woman walking down a sidewalk, I see a woman walking down the sidewalk near a bunch of steps and columns. The Rhythm, can be seen in the color, columns, and stairs . This (descriptive Element of Art) conveys a sense of coalition in my opinion. This image is appealing to me because all of the elements in the picture work together to make this picture what it is.