The induced motion refers to the illusion of motion caused by the motion of an object that causes an adjacent stationary object to move. According to the above definitions, Which of the following are induced motions:. ['Light a candle in front of the blackboard and watch the candlelight to see the candlelight moving.', 'Multiple pictures are successively presented at a certain spatial interval and time distance to form a movie.', 'Look at a certain part of the waterfall and look at the surrounding trees.', 'When we look at the night sky, we see the moon moving, and the clouds are still.']