Final answer:
Either a finger wave or the shape you are looking for when you cold wave is a/an: c) P-wave.
Step-by-step explanation:
When referring to finger waves and cold waves, the shape that is formed is an P-wave. A P-wave refers to a zigzag path from the crest to the trough of a wave. This type of wave forces the particles of the medium to follow a zigzag path. By pointing the right-hand thumb in the direction of current, the right-hand fingers curl counterclockwise, resulting in the magnetic field being in the counterclockwise direction.
When you point your right-hand thumb in the direction of current, the right-hand fingers will curl counterclockwise, so the magnetic field will be in the counterclockwise direction. So therefore the correct answer is c) P-wave.