Answer:
Metallurgy
Explanation: The word metal is literally in the answer
The Lend-Lease Act was the program that resulted in the rental of weapons by the United States of America to countries such as United Kingdom, Soviet Union, China, Free France and other allied nations.
The act is associated with the term "Arsenal of Democracy" because of president Roosevelt, who named like that the weapons when he had the idea of the lend-lease.
A. “Arsenal of democracy”
The northerners were angry in response to the Fugitive Slave Act, which eventually drove both sides even further apart and resenting each other more.
