The Exposure Triangle
ISO - ISO is the sensitivity of the image sensor so the lower the number your picture will be more grainier but if higher then it will be finer and is more sensitive to light.
Aperture - Aperture is the opening of the lens. It is about how much light gets in through the lens so the larger the hole the more light gets in but the smaller the hole the less light gets in. This can have an impact on the exposure.
Shutter Speed - Shutter Speed is how fast the shutter goes before taking a picture. This can have an impact on the motion of the image so if it is higher then the motion will be less and it will freeze but if it is low then the motion will be there and visible.
Aperture - Aperture is the opening of the lens. It is about how much light gets in through the lens so the larger the hole the more light gets in but the smaller the hole the less light gets in. This can have an impact on the exposure.
Shutter Speed - Shutter Speed is how fast the shutter goes before taking a picture. This can have an impact on the motion of the image so if it is higher then the motion will be less and it will freeze but if it is low then the motion will be there and visible.