Step 1: Concept
Hematocrit is the volume percentage of red blood cells (RBCs) in the total blood volume.
Step 2: Meaning
It is a crucial indicator of the oxygen-carrying capacity of the blood.
Step 3: Analysis
A low hematocrit value indicates a decrease in the concentration of RBCs, which is often a sign of anemia.
Step 4: Conclusion
Hence, low hematocrit represents fewer RBCs than the healthy range.
Final Answer:(D)