D) Nicotine. Just one thing you need to memorise
Answer: chemical digestion: The process of enzymes breaking down food into small molecules the body can use.
Explanation:
Answer:
Explanation:
Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium.
Pretty sure it’s studies because you read textbooks to learn more about the subject. So B.Studies