Ok, let me try. A low aperture means only what is in focus is clear, a high aperture means whatever is focused on plus the foreground and background are in focus. A fast shutter speed means something moving will appear to be still and a low one with a moving subject will be blurry. A higher iso is used in dark places like how our eyes adjust to the light. Also a higher iso will make a more grainy image
Because there's more noise
But you also have to explain aperture and iso. I think aperture is with regards to the pinhole size but I'm not sure what iso is.
This is missing a good amount, an increase in shutter speed also means more light, and ISO isn't just noise but its meant to pick up small details in lower lighting.
But you also have to explain aperture and iso. I think aperture is with regards to the pinhole size but I'm not sure what iso is.