Answer:
Nuclear medicine or PET scanning (Positron Emission Tomography)
Explanation:
Not super sure what your question is looking for but I think it can be either. PET is a technology used in the nuclear medicine field, and nuclear medicine is a broad field of using the technology the question described.
D; solar system, because the planets are inside it.
luxury goods might not be bought
Explanation:
this is my answer this is helpful for you