The answer is; C
Fossil fuels are the remains of an organism that lived in the past and have been preserved or their impression has been preserved. Fossils are studied to identify the difference (genetic and phenotypic) between past and future related organism and are carbon dated to determine the time in which the organisms existed. The study of fossils is called paleontology.
Answer:
it can be mitochondrion or ser
Do you have the options? lol
I believe the answer is Bone Marrow.
Hope this helps! <3