For the first question it Basically means, how did the invention (which is the cotton gin) affect slavery. In this case, it affected slavery in the US because this made it easier for slaves to pick cotton but it increased the work for slaves which was great for white owners but bad for slaves
Answer:
I would say into WW1 because of the Zimmerman affair.
Explanation:
United States entered the WW1 in 1917, although for three years they were not officially involved in it. But, then a telegram was intercepted, in which an official letter was sent to Mexico by German authorities.
According to it, Mexico was to declare war on United States, while Germany will support them in the war efforts.
Many historians are doubting the reliability of this document.
<span>The trench warfare made the war longer, because at times soldiers could be 100 metres underground making it harder for enemies to kill them. </span>
Answer:
During the 1920s, the arts and media responded and adjusted to shifts in the larger society. World War I had changed America's relation to the world, the American economy boomed after the war, and young people embraced more modern lifestyles. The arts responded to all these social trends.
Explanation: