This poster shows an art festival advertisement! I can tell they use many different colours to symbolize the excitement and fun everyone will have at the festival. The dominance of this design would be the huge colourful typography "Ethnic" at the top. This is to catch everyone's attention as ethnic consists of many different cultures, religion and so on. The balance is symmetrical as the weight is equally distributed on both sides. I can also see the proportion of the size of the elements. The word "ethnic" is bigger than the rest of the words. The typography also shows proximity. All the typography are close together as they are telling information about the art festival. It makes it neater and easier to understand. The use of white space makes the whole design stand out better as the fun rainbow colours are the main point of this design.
From what I can see, the designer used both Adobe Photoshop and Illustrator. He used the pen tool to create the funky rainbow "pathway". The tree is definitely an image he used and dragged it on to the poster. The type tool is what created the typography. He also a mixture of pen tool and type tool to create the "ethnic" typography which is pretty awesome. I hope my own design will look as great and colourful like his! :)