Answer:
a. anti slavery
b. Abraham Lincoln
c. making abolition a war goal
Explanation:
The Emancipation Proclamation contributed in no small part to the defeat of the Confederacy in the Civil War because it gave the Union the support of the Abolitionists and the Black Americans in both the North and the South.
At a time where the Union was experiencing losses in the battlefield and Abraham Lincoln was losing support, the Abolitionists rallied behind him and gave him the support needed to push on.
The war also ensured that the European nations who might have supported the Confederacy, steered clear of the conflict as they did not want to be seen as supporting slavery.
Railroads on the Railways required tracks for the trains to run on them these tracks earlier made up of iron for its heavy duty but soon enough realise that iron was not a very good option for tracks. Meaning drawbacks of using iron for example rusting is it was realised that Steel was a better option in making railroads.
Steel being made out of iron is heavy duty material yet it is not much prone to rusting. Just addition of certain minerals and carbon in iron steel forging is done making it heavy duty material.
Easy , Io, in Greek mythology, daughter of Inachus (the river god of Argos) and the Oceanid Melia. Under the name of Callithyia, Io was regarded as the first priestess of Hera, the wife of Zeus. Zeus fell in love with her and, to protect her from the wrath of Hera, changed her into a white heifer.
Hope this helps ;)
Maine and Missouri were added