Which raw materials had to be shipped to the construction sites in large quantities because they were essential for building the railroad tracks?

Wood and Iron

Explanation:

To built railroad tracks it is required to obtain woods from forests for the wooden rail ties. Wooden ties (sleepers) were used in tracks to hold long iron tracks in its place when a train moves above it. Historically, wooden ties used at the beginning of railroad expansion, which shipped from forest areas to the construction sites. Iron placed an important in building the tracks because of its quality of being very strong, holding weight, and resisting heat.        

1. where does the energy of a nuclear power plant come from?

d) political bosses should not hold office

what are the options mate?

explanation:

not to be rude or anything but, nobody can really answer that if you don't add the options sorry if it came of rude uwu