My biggest problem with #4 is, what are you trying to show? What is this a picture of? I've deduced that it's a fire truck, but what about the car in the background? It's too small for me to even tell it's damaged. You have a lot of blank space at the left side which just leaves me wondering why?
#4 actually has lots of small issues as well, if you look closely at it. There is a tangent where the light on the left side of the fire truck meets the car in the background. The text on fire truck is cut off and I have no idea what it says. There are also some tangents with the truck and the bottom of the frame. My eyes are drawn to the center of the frame, where the lights of the truck are. Our eyes are naturally drawn to the brightest parts of the image, but when I get there, it's non informative, and a little boring being centered.
If you go to your local library and pick up a book on basic composition, it will help a lot. There are lots of things to be aware of when composing a photo. There are no "rules" as to what to do, but there are reasons why certain things look good, and others don't. Why certain things engage the viewer, and why others don't. It's a good idea to learn those concepts.