B is the answer. Sharks need salt water to survive to make the breathing and blood pump through their bodies.
The use of skin disinfecting compounds are required for surgical scrubbing and not for everyday handwashing because surgeons do surgery inside of someone's body and if the doctor had an infection or illness, it might be fatal for the patient. Although, it is great to wash your hands, it is more important for a surgeon to wash their hands before performing surgery.
It produces large amounts of oxygen
Answer:
sedimentary rock
Explanation:
Sedimentary rock preserves almost all fossils. Sedimentary rocks such as mudstone, shale, and limestone are likely to contain fossils.