Natural Science CLEP Prep Practice Exam

Elements carbon, oxygen, and hydrogen are commonly found in living organisms and are essential for the formation of life-sustaining molecules. This type of compound is known as organic, meaning it is directly associated with living matter. Options A and D, mineral and inorganic, respectively, do not typically contain these elements in their composition. Option B, metal, may contain carbon and oxygen in some rare occurrences, but it does not typically contain hydrogen in its pure form. Therefore, option C, organic, is the most accurate and logical choice.