A picture is worth a thousand words.A very good example is the finding of many cave paintings which were very well-known form of primitive communication.Many archeologist sites around the world have found carved paintings on stones and has asserted the fact that paintings were always used to convey the messages.Or in other words that any complex idea you are trying to explain to your readers in several detailed sentences can actually be better clarified with the use of one single picture.Communication has existed in various forms since man appeared on Earth.Communication means to convey your massage effectively.