List the major subdivisions for each of the four types of carbon or organic compounds within living organisms.

The 4 types of organic compounds and their subdivisions within living organisms are:
1. Carbohydrates:
           - Monosaccharides,
           - Oligosaccharides,
           - Polysaccharides.
2. Lipids:
           - Fats,
           - Phospholipids,
           - Waxes,
           - Sterols.
3. Proteins:
           - Primary structure (amino acid sequence),
           - The secondary structure,
           - The tertiary structure,
           - The quaternary structure.
4. Nucleic acids:
           - DNA (deoxyribonucleic acid),
           - RNA (ibonucleic acid).

The answer would be sand and gravel