The substance that will not absorb X-rays is metal.
1. Bone and skin both absorb X-rays to varying degrees, which is why X-rays are useful in medical imaging. Bone absorbs more X-rays than soft tissues like skin, creating contrast in the resulting image.
2. Metal, on the other hand, does not absorb X-rays as effectively as bone or soft tissues. This is why metal objects like implants or jewelry can appear as bright spots on X-ray images since the X-rays pass through them without being absorbed as much.
In summary, when considering which substance will not absorb X-rays, the correct choice is metal.
