Which lists the correct order of events leading to a sound being "heard" by a person? 1. the fluid-filled inner ear moves hair cells, which send signals to the brain. 2. the eardrum vibrates at the frequency of the sound waves entering the ear. 3. the bones of the middle ear, which are attached to the eardrum, start to move, pushing on the oval window. (1) 2, 3, 1 (2) 1, 2, 3 (3) 2, 1, 3