Answer:
The technological changes included the following: (1) the use of new basic materials, chiefly iron and steel, (2) the use of new energy sources, including both fuels and motive power, such as coal, the steam engine, electricity, petroleum, and the internal-combustion engine, (3) the invention of new machines
Answer:
true
Explanation:
If its something someone can look at then it is a visual aid
Answer:
B
Explanation:
b. The nation's economy had worsened during his presidency
took me a while to search that up hope it helpedddd