The Simpsns is a world famous cartoon. Particularly taken in honor of section 400 of the index
one of the questions the producers were trying to answer in the program was what were their distinguishing characteristics. Designers have expressed that their secrets have a completely different and distinctive set of physical characteristics of each character. It also emphasizes the fact that the sounds of the target are received by the image and sound, so that the sounds are recognized at the same time.
Whether or not the physical distinction has taken place is based on the determination of whether or not the target has been identified from the hero's shadows according to the designers. For this reason, from the beginning of the series to the present day, they have made numerous changes to the characters to differentiate each one and eventually the characters have been classified by their target groups according to their shadows.