Select all that apply. carbohydrates
1. in the body are primarily fats
2. are primarily sugars and starches
3. are the most readily available source of energy for organisms
4. are the largest of the four main biological macromolecules

The statement that correctly completes the sentence 'Carbohydrates ' is 2. are primarily sugars and starches. Carbohydrates are biological macromolecules made up of carbon, hydrogen, and oxygen. This group includes sugars and starches. They are not fats because fats are another group of biological macromolecules.