Aperture, how do they all work?

F/2.8

F/16

1. What part of the body should we closely relate aperture? The Eye

2. Finish this sentence - the smaller the Aperture the larger the F number, the higher the Aperture the smaller the F number.

3. In your own words tell me how aperture impacts Depth of Field? It makes the area of the image sharp.

4. With the camera near you - tell me the F stops available on the lens currently attached. F5.0