I believe the bone system that red marrow belongs to is D. Skeletal system.
Answer A fabric used to sew the dresses a company sells should be correct. Because renting a factory and fixing something is a Fixed Cost. Let me know if that’s right!
Answer:
A reaction that joins the nuclei of two atoms into one
Explanation:
Think of the words "nuclear fusion".
Nuclear = "relating to a nucleus"
Fusion = "joining"
So, nuclear fusion is the joining of two nuclei into one.
A and B are wrong, because chemical reactions involve electrons.
D is wrong, because the splitting of a nucleus is fission.