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Hopes this helps:
Answer: Industrialization helped fuel the start of imperialism in the 19th century. ... Soon, industrialization spread throughout Europe and to the United States. These new industrialized nations needed more raw materials to fuel their mass production and population growth.
It increased the demand for steel since steel was used to make railcars and tracks.
Steel was used to make railroad tracks and cars because it was the only metal strong enough. So the expansion of the railroad industry would mean more steel had to be used and thus it would increase the demand.
