Over- Exposure
This is an example of overexposure. This occurs when you have a longer exposure. The shutter speed is longer. I took this picture of a tree outside. The darker objects are obviously still visible. The sky is mostly white due to the fact that there was too much light coming through the camera.
Color in Select Areas
I used a full color photo and made a new layer that was black and white. I then layered masked it and erased the spot I wanted to be in color. This edit in photoshop was used to create a focal point. I chose the focal point of the sunset that is reflected in the mirror.