Everything else that uses steam, From the Cotton mills to the boats to the trains.
Mary White Ovington, Ida B. Wells, W.E.B. Du Bois
All of them are correct except the first one
I already answered this for you. It's Persian messengers.
Corn accounted for the size and sophistication of the Native American civilizations in Mexico and South America by molding the Pueblo culture in terms of its technology and development. This includes the development of irrigation systems in order to water their corn fields.
