Final answer:
Steel production contributed to the growth of other key industries by providing a cheaper and more readily available material for construction and manufacturing.
Step-by-step explanation:
Steel production played a crucial role in the growth of other key industries during this time period. As the production of steel increased and its price dropped, industries such as construction and automotive heavily relied on steel for their growth and development. Steel became the cornerstone of the American economy, driving industrial growth and stability. For example, the construction industry used steel for building structures such as bridges and skyscrapers, while the automotive industry used steel for manufacturing cars.