What is the name of the bone that is located on the anterior region of the bony thorax? it is shaped like a long flat bone and connects to the ribs by costal cartiledge.

a
floating rib
b
sternum
c
vertibrae
d
scapula

B.
The Sternum It is a long, flat bone that consists of 3 bones. 

B is the answer it is shaped like a long flat bone

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.