Generally speaking, Japan was becoming an Imperial power right before ww 2. They were waging war on China and Manchuria; and some other island nations. Therefore weakening Japan's steel supply was aimed to slow down their momentum.
It seems to be true from the other dudes answer
Answer:
By emotional appeal
Explanation:
Roosevelt was an American President and also a Nobel Price winner for Peace. He proposed the Four freedom Speech which was filled with lots of emotional appeal and was missing that substantial evidence.
They would usedarker shades! Hope this helps :D