Answer:
Jazz and Jazz-powered popular music became a rallying cry for U.S. soldiers and also helped improve the moral of loved ones at home who were driven to make war on the home front by listening to patriotic and romantic radio songs and their phonographs.
~DjMia~
Answer:
Most likely because of potato famine. A lot of starvation happened and there were diseases.
You can conclude that the earth is overtime, getting warmer. Whether it be naturally or from pollution/contamination by big corporations.