Why was teak timber considered commercially important in Java?

Correct answer: It was strong and durable timber

Direct answer: Option A is correct. Teak was commercially important in Java because it is strong and durable timber. Strong wood can bear heavy loads, and durable wood lasts for a long time instead of decaying quickly. These qualities made teak valuable for ships, buildings and other large construction needs, especially for colonial powers interested in trade and naval activity. Step by step: teak has strength; it resists wear and lasts; long-lasting wood is valuable; therefore it becomes commercially important. Option A is correct because it states the useful physical qualities. Option B is wrong because teak is wood, not sea salt. Option C is wrong because teak is not a cotton flower. Option D is wrong because teak is not stone, although it may be used in construction. The question asks why it was commercially valuable, so focus on quality and uses, not on an unrelated material. Memory cue: teak means strong, lasting wood, especially useful for ships.