C. The cells that make them up each contain genetic information.
Explanation:
A and B are not the answer because prokaryotes are unicellular organisms while eukaryotes are multicellular organisms. D is not the answer because prokaryotes do not have a nucleus, leaving the DNA floating in the cytoplasm.
The correct answer is C. It is not A and B because prokaryotic cells (bacteria cells, etc) are unicellular, and eukaryotes (animal and plant cells) are multi cellular. And it is not D because prokaryotic cells do not have a nucleus. So you are left with C.
The decay cycle for living things "reduces the amount of dead material" on the body. This material decomposes and goes into the soil or water, or whatever environment is present.
