This Photo is an example of a wide apeture, the size of the apeture will change the visibilty of the background.
This is an of a high IOS photo, the darker the are is the higher your ISO should be
This is a slow shutter speed photo, shutter speed changes the amount of time the shutter opens for, the shutter is what alows light to hit the film and expose it.
This photo is an example of white balance. White balance will change what is considered a true white by what the lighting is in the photo.
Richard avedon 1923-2004
Richard Avedon was a photographer from the timey times (The 1900's), Richard took many photos but he mainly focused in taking portraits of famous people. He took picture of people from John F. Kennedy to Marilyn Monroe, he was "the" photographer.