Step 1: Concept
Secondary growth and wood characteristics.
Step 2: Meaning
Differentiating types of wood based on vessel properties and function.
Step 3: Analysis
Late wood has narrower vessels (C); Early wood has wider vessels (A); Heartwood involves organic deposition (D); Sapwood is functional secondary xylem (B).
Step 4: Conclusion
The matching is I-C, II-A, III-D, IV-B.
Final Answer: (D)