Answer the following question given this paragraph: 

Biochemical compounds are carbon-based compounds that make up living organisms. There are four main classes of biochemical compounds: carbohydrates, proteins, lipids, and nucleic acids. The classes have different structures and functions.


Q: Living organisms are made up of what type of carbon-based compounds?

 Choices:

- microbial

- biophysical

- synthetic

- biochemical

A:
biochemical
