The correct answer to this open question is the following.
Although you do not attach options for this question or the country, or the period in time, we assume you refer to the United States and the period that started during the colonial times.
If that is the case, then we can say the following.
Historically, the area that would have been the best place to locate industries that relied on mills such as textiles was the territory of Massachusetts and some other eastern regions of the country.
It was at the end of the 1700s that the Textile industry started in the United States in New England. From there, the textile industries spread to Virginia and Kentucky. Many years later it spread to Georgia. The advent of the Cotton gin represented the new technology that created a "boom" of textile plants in the United States.
