Answer: When you repeat a certain size or shape or color you add strength to the overall image. Repetition is a basic concept in the world of art. If you want to make a statement, you repeat certain elements again and again. If you repeat something once or twice it becomes more interesting.
The Neolithic Period was a time of change from the Paleolithic Period and examples of such are: People moved from nomadic life to starting villages and people started building permanent shelters made out of hides and branches for example.