The Answer is B) support and protection because your bones protect and support your organs.
Answer: Our kidneys filter out excess ions from our blood so that they can be excreted through urine. If the concentration of ions is too high, the kidneys make sure to filter as much of them as they can out of the body. If there are not enough ions, the kidneys will filter them back into the system.
Hope it helps
Starfish reproduce asexually by fission.
I think it’s the atomic number