Answer:
Two essential molecules found in all organisms and that require nitrogen to make them are DNA and proteins (options B and D).
Step-by-step explanation:
Nitrogen is the most abundant element in the atmosphere and is important for the construction of some organic molecules.
Both nitrogenous bases and amino acids have nitrogen in their molecular structure, and they serve for the constitution of nucleic acids, such as DNA, and proteins.
The process of incorporating nitrogen into living organisms begins with the nitrogen-fixing bacteria found in the soil, which are absorbed by plants and then consumed by animals.
Other options are not correct because both carbohydrates and fats have a predominant composition of carbon, hydrogen and oxygen.