Which setting is used to control the amount of light reaching the camera sensor?

The correct answer encompasses all available options because each one plays a vital role in controlling the amount of light that reaches the camera sensor.

Aperture directly affects the size of the lens opening, which determines how much light can enter the camera. A wider aperture allows more light in, while a narrower aperture limits light.

ISO refers to the sensitivity of the camera's sensor to light. A higher ISO setting increases sensitivity, allowing for better performance in low-light conditions, but it can also introduce noise if set too high.

Shutter speed controls the duration for which the camera's shutter remains open. A slower shutter speed permits more light to reach the sensor over a longer period, while a quicker shutter speed limits the amount of light entering the sensor.

Each of these settings works in conjunction to achieve the desired exposure in a photograph, thus demonstrating that they all contribute to controlling the light that hits the sensor.