Carbohydrates contain a. carbon, nitrogen, and phosphorus. b. carbon, sulfur, and potassium. c. carbon, hydrogen, and oxygen. d. carbon, helium, and sodium.

Carbon, hydrogen, and oxygen. (Ans. C).

Explanation:

Carbohydrates are defined as macronutrients consisting carbon, hydrogen, and oxygen atoms, which are found in vegetables, fruits, milk products, and grains. They are known as the basic food group, a healthy diet, and playing important role in the proper body functioning. Some important function of carbohydrates are:

1) Carbohydrates provide energy for working muscle, and fuel for the central nervous system.

2) Carbohydrate are also important for brain function.

3) They help to reduce the risk of diseases.

4) In the form of fiber carbohydrates helps to improve the health of digestive system.

d. planting trees

the trees take in carbon to make oxygen.