Without knowing your previous answer I would say C
Answer:sponge
Explanation:a sponge doesn’t have a backbone
As cells die, and reproduce from time to time, educational references show that every seven years, all cells have been replaced and considered as brand new. This also applies to the skeletal system. However, this statement is still not verified by health researchers.
The therapy can find the damaged cancer cells and prevent it from reproducing, or even taking it off the gene so that none person from the next generations will suffer the same.