photograph’s exposure determines how light or dark an image will appear. And aperture controls the area which light can enter your camera. Shutter speed controls how long the shudder is open and letting light enter. The more shutter speed there is the more light there will be. A higher shudder speed is better for darker places. The camera’s aperture setting is what decides a photo’s range. A cameras mode influences how ISO and apurature and shutter speed are given exposure some modes pick all of them, other let you pick.