Different Movement. A whale movement is swimming... a penguin uses its crappy feet to make a different movement, waddling or hopping... a train uses rolling movement, a boot is used for walking, and the 'difficult' one -- the piano? A piano movement is: Def: 10. (Music) A self-contained section of an extended composition. .... Kinda tough puzzle for youngsters.. but maybe this test originally came out during the big 'Communism" period of Russia when all youngsters were tested for abilities such as athleticism (remember the Olympic fervor?), musical ability (National Orchestra), chess, etc... anything to showcase the great "talent pool" of Russian youths. So either the kids were familiar with the term "movement", or this test just actually was a form of a "reported IQ test"... getting this one right sent you for a real IQ test by the State... dunno about that... but this is the answer to the Common Factor