A camera dioptre is an optical tool that adjusts your camera’s viewfinder to suit your eyes. This is especially important for photographers with glasses.
Macro photography is defined as the genre of photography where the size of the photograph of the subject is larger than the subject in real life.
An aperture in plain simple English means a hole or a gap. In photography, it refers to a hole/opening at the back of the lens..
Shutter speed determines the time period during which the shutter opens up to let in light to the camera image sensor