What was considered the main product of commercial forestry?

Correct answer: Timber

The direct answer is A: timber was the main product of commercial forestry. Commercial forestry treats forests as sources of products that can be sold for income, and the central product in this chapter is usable wood. Colonial governments wanted timber for railways, ships, construction, mines, and other industries. They therefore selected valuable trees, regulated forests, and encouraged planned production. Option A is correct because timber means wood obtained for commercial use. Option B is wrong because sea salt comes from coastal or salt-making activities, not from the main work of forestry. Option C is wrong because cotton cloth is a manufactured textile product made from cotton, not the main forest product. Option D is wrong because kerosene is a petroleum product, not timber. The reasoning is simple: commercial forestry focuses on marketable forest output; the most important such output in this lesson is wood. Other forest products may exist, but they are not the main answer here. Memory cue: “commercial forestry = forests managed for saleable timber.”