In the context of the human body and the types of muscles, the best level of organization represented by each type of muscle is:
- Skeletal Muscle: D. tissue (Skeletal muscle is composed of muscle tissue which consists of muscle cells working together.)
- Smooth Muscle: D. tissue (Smooth muscle also forms a type of muscle tissue found in the walls of organs.)
- Cardiac Muscle: D. tissue (Cardiac muscle is a specialized muscle tissue found in the heart.)
In summary, all three types of muscles—skeletal, smooth, and cardiac—are classified at the level of tissue.