Many people would get sick from the pollution that was a product from coal smoke and working, hard, long hours without any form of a break. Plus, since large machinery was relatively new in this time era, they were particularly unsafe and lead to many workplace related accidents and deaths.
Answer
the building of something, typically a large structure.
It is d it took me a while to read but it’s D
<span>Ellipsis are a series of three periods used in a quotation to show that words have been omitted. </span>