Why did demand for railway sleepers put extraordinary pressure on forest resources?

Correct answer: Because it required a continuous supply of large quantities of durable timber

The direct answer is A: railways required a continuous supply of large quantities of durable timber for sleepers. A sleeper is the strong beam placed under railway rails to support them and keep the track stable. Railway expansion meant that many kilometres of track needed many sleepers, and damaged sleepers had to be replaced. Therefore the demand was both large in scale and continuing over time. Option A is correct because it includes quantity, durability, and regular supply. Option B is wrong because sleepers were generally made from strong materials such as timber, not soil. Option C is wrong because railways increased their use of timber rather than stopping it. Option D is wrong because sleepers do not increase forests; obtaining them usually required cutting trees. The reasoning is: more railway lines means more track; more track means more sleepers; more sleepers means heavy pressure on suitable forests. Memory cue: “railway expansion equals repeated demand for strong sleepers.”