This is the last of Wertheimer's principles taken over by Koffka ,although Wwetheimer had several more.
Organization in perception tends to occur in such a manner that a straight line appears to continue as a straight line, a part circle a circle, and so on,even thouth many other kinds of perceptual structuring would be possible . Closure and continuation are aspects of articulate organization.Oragnization applies to learning as well as to perception