Through a mechanical chain of events, sound waves traveling through the auditory canal cause in the eardrum. A. miniscule vibrations
B. minute differences
C. nerve disorders
D. hearing loss

Hey your answer should b c

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other. 

The fetus at this stage is curled up, almost doubled over, so remember to consider this as you draw the fetus the correct length