1) Construction techniques they invented from building pyramids.
2) Creating a writing form - Hieroglyphics.
3) And irrigation systems and agricultural techniques.
It Is True For the first question.
I believe that the answer to the question provided above is because of industrial revolution US shipping industry flourish in the late 1700's
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Creation of power machine and factories provided many new jobs, increased production, gave ppl ability to transport raw materials. It led to urbanization. Urbanization, which is the movement of ppl into cities and buildings. People wanted to live closer to where they worked. The western workd went from rural and agricultural to urban industrial. HOPE THIS HELPS YOU
Because he seen opportunity for expanding his empire