The second one man. I believe that's the answere
Answer:
B. He greatly improved existing steam engines for use in factories.
Explanation:
James Watt made important changes to the design of the steam engine, which increased efficiency and made steam engines cheaper to run.
Answer: d.
Explanation: they used them to spy on each other
Answer:
Causes: The immediate causes of the War of 1812 were a series of economic sanctions taken by the British and French against the US as part of the Napoleonic Wars and American outrage at the British practice of impressment, especially after the Chesapeake incident of 1807.
Effects: Economic impact
Although during the War of 1812 the United States' economy was severely damaged by the British blockade, the aftermath gave a dramatic boost to the manufacturing capabilities of the United States.
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