Final answer:
Entrepreneurs built textile mills near the source of their raw materials in the 1840s.
Step-by-step explanation:
In the 1840s, entrepreneurs built textile mills near the source of their raw materials. They did this because being close to the source of raw materials, such as cotton, allowed for easier and more efficient production. By locating the mills near the raw materials, transportation costs were reduced, and it was easier to obtain and process the materials needed.