The 3 pillars of exposure

Aperture

1. The pupil
2. The smaller the pupil the smaller the aperture. The larger the pupil the larger the aperture.
3. The larger the aperture, the smaller the area in focus.

F16

F2.8

Shutter speed

Fast shutter speed

Slow shutter speed

A.  The dunking booth

 Fast shutter speed

B. The food eating contest

Medium shutter speed

C.  The rock climbing wall

Medium shutter speed

D. Someone working at booth

Slow shutter speed

E. The Dj/MC working at the middle of the circle

Medium shutter speed

F. The diamonds performing

Fast shutter speed

1. By setting the camera "shutter Priority" mode, where you set both the shutter speed and the camera automatically selects the aperture.
2. By setting the camera to "manual" mode, where you set both shutter and aperture manually.

ISO

1. Theres more noise, freeze motion, ultra fast shots
2. Use low ISO when theres enough light around you
3. When theres not enough light

F4=good

F5.6=little dark

F8=little dark

F11=dark

F16=dark

F22=dark