Final answer:
The steam engine provided manufacturers with a new source of power for machines during the Industrial Revolution.
Step-by-step explanation:
The correct answer is B. Steam engine. The steam engine was a groundbreaking invention during the Industrial Revolution that provided manufacturers with a new source of power for machines. It transformed industries by allowing them to be powered by steam rather than human or animal labor. The steam engine was used in various sectors such as manufacturing, transportation, and agriculture.
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