Step 1: Understanding the Question:
This question tests knowledge of wood modification and storage.
Step 2: Detailed Explanation:
Chemically modified wood can be stored for the longest time.
It is resistant to decay and pests.
Impregnated wood (A): Also durable but not as long.
Heat stabilized wood (B): Not as durable.
Compressed wood (C): Not as durable.
Thus, the correct answer is chemically modified wood.
Step 3: Final Answer:
Thus, chemically modified wood can be stored for the longest time, which corresponds to option (D).
[0.5cm]