Answer:
Samuel Slater brought technologies from England
Explanation:
In 1790, Samuel Slater built the first factory in America, based on the secrets of textile manufacturing he brought from England. He built a cotton-spinning mill in Pawtucket, Rhode Island, soon run by water-power. Over the next decade textiles was the dominant industry in the country, with hundreds of companies created.
https://en.wikipedia.org/wiki/Samuel_Slater
The answer is: The sea
Back then, the techology that exist to travel by sea was not as developed as it is today. If an empire decided to travel through the sea in order to do some conquests, that empire will risk several things, such as:
- Loss in directions
- The ships could be swallowed by harsh wheather in the middle of the sea
- It need a lot of resources to maintain the armies during the travel
The Great Wall of China was built over 2,000 years ago, by Qin Shi Huangdi<span>, the first emperor of China during the </span>Qin<span> (Ch'in) Dynasty (</span>221 B.C<span> - </span>206 B.C.<span>). In Chinese the wall is called "Wan-Li Qang-Qeng" which means 10,000-Li Long Wall (10,000 Li = about 5,000 km).</span>
