Complex sentence: Clouds of this physical structure have both cumuliform and stratiform characteristics in the form of rolls or ripples and generally form as a result of limited convection in slightly unstable air topped by an inversion layer.
Split into simpler sentences: Clouds of this physical structure have both cumuliform and stratiform characteristics in the form of rolls or ripples. They generally form as a result of limited convection in slightly unstable air topped by an inversion layer.