Answer:
Aperture: opening in a lens through which light passes to enter the camera.
2. Lens: an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.
3. Shutter: device through which the lens aperture of a camera is opened to admit light.
Step-by-step explanation: