What did the Indus Valley civilizations have that the Egyptians and the Mesopotamians did not have? (hint: plumbing)

A thriving, urban civilization had existed at the same time as Egyptian and Mesopotamian states ... The people of this Indus Valley civilization did not build massive monuments like their ...

Explanation:

HOPE IT HELPS ...

which time period is this? or is this story fictional, i'm going to need more info to answer this question

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.