Two or more items are grouped together around a center. The balance, weight or attractiveness (including the attractiveness of shape, color, etc. ) on both sides have equal weight, giving a sense of tranquility, which is called equilibrium. By definition, Which of the following are not in equilibrium? ["In a children's park, there is a kind of seesaw. Two children of the same weight are seated on both sides of the seesaw, and the two are seated at the same distance from the center.", 'One eye, one ear, one nostril, one face, one hand and one foot on each side of the human midline.', 'A model is wearing a silver-gray suit, a pair of beige leather shoes on her feet, and a green casual bag on her shoulders.', 'Da Vinci\'s famous painting "The Last Supper", the picture is a rectangle, centered on Jesus, the disciples are on both sides of him, the number of people is the same, the distance between the people on both sides and Jesus is the same, and the background on the walls on both sides is the same.']