What was the direct link between deforestation and railway expansion?

Correct answer: Railways needed timber and land

Direct answer: A, railways needed timber and land. Railway expansion required land for tracks, stations and related works. Wooden sleepers were placed beneath the rails, so large quantities of suitable timber were needed. As railway networks expanded, the demand for wood increased pressure on forests, while clearing land also removed forest cover. B is wrong because railways require routes over land; the sea is not the direct resource described here. C is wrong because gold was not the material used for railway sleepers. D reverses the relationship: expansion generally led to forest clearing and timber extraction, not a need to increase forests. Memory cue: railway expansion means tracks plus sleepers; both land and timber connect railways with deforestation.