Before the steamboats, man had only the power of muscles (whether his own muscles or the muscles of animals). He depended on these muscles in transportation. This made transportation a very long and tiring journey.
Steamboats' main advantage was providing faster transportation to both people and goods. This reduced the time and the effort needed for transportation.
However, they were not very safe or accurately designed. Many people died as a result of the explosion of the boilers.
Answer:
1) The poem is about the holocaust perpetuated by Nazi Germany on jews, gypsies and anti-Nazi protesters during World War II.
2) Nazi government and soldiers of Germany during the war.
3) Adolf Hitler and his Nazi regime.
"c. A narrative source" is what a historian would use to get a firsthand account of a past event, since in these sources (which are also primary sources) a person is giving a first-hand account of the event itself.
