Answer:
Carbon, Hydrogen, Oxygen, Nitrogen
Explanation:
In many biomolecules, we have Carbon, Hydrogen, Oxygen, Nitrogen. These elements are somewhat central to life activities.
If we take carbohydrates for instance, they are composed of Carbon, Hydrogen and Oxygen. Carbohydrates are energy molecules which are broken down to supply energy in the body.
Proteins all contain nitrogen because they involve the amino group. Hence, Carbon, Hydrogen, Oxygen and Nitrogen are most abundant in biomolecules.
