1. What part of the body should we closely relate aperture?
THE PUPIL

2. the smaller the Aperture lens , the higher the Aperture number

3.In your own words tell me how aperture impacts Depth of Field?

A large f number like f32 will bring an object at focus along with the background, but a smaller aperture like f2.8 would focus on one object blurring out the back ground.