Final answer:
The four major elements found in the human body are C) carbon, hydrogen, oxygen, and nitrogen, which are essential for forming biological molecules. Collectively, these elements make up about 96% of our body mass and play a vital role in the structure and functioning of cells.
Step-by-step explanation:
The four major elements found in the chemicals that comprise the human body are carbon, hydrogen, oxygen, and nitrogen. These elements are crucial as they make up about 96% of the mass of the human body and are found in all living organisms.
They are the building blocks of the biological molecules such as nucleic acids, proteins, carbohydrates, and lipids. Each of these elements contributes unique properties that allow for the formation of complex compounds necessary for life.
Oxygen is the most abundant element in the human body by mass, followed by carbon, hydrogen, and then nitrogen. Carbon is known for forming four chemical bonds leading to an array of complex organic molecules. Hydrogen bonds with various elements and plays a crucial role in the structure and properties of water. Nitrogen forms three bonds and is a key component of amino acids, the building blocks of proteins.
Therefore, the answer to the question is option C) carbon, hydrogen, oxygen, and nitrogen, from the choices given by the student.