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.        

the second world war (wwii) was one of the major trans formative events of the 20th century, with 39 million deaths in europe alone. large amounts of physical capital were destroyed as well through six years of constant ground battles and bombing. many individuals were forced to abandon or give up their property without compensation and to move on to new lands. periods of hunger become more common even in relatively prosperous western europe. families were separated for long periods of time especially from their fathers. many including young children would personally witness the horrors of war as battles and bombing took place in the very areas where they lived. horrendous crimes against humanity were committed. due to wwii, political and economic systems in many countries would be permanently altered.

they remained in rural areas and worked at jobs such as lumbering or farming.