1. in what present-day countries can the sites of the nile in east africa and huang be found?

The Nile river and Huang are found at the location sites mentioned below.

The Huang or yellow River which is the second longest river in China originates from Bayan Har Mountains in western China, flows through nine provinces in central china and empties into the sea of Bohai near Dongying city.

Nile River in northern Africa is among the world's longest waterways.It rises from the south equator and flows in northward Africa and drain into Mediterranean sea. It's length is about 4132 miles.

Its basin includes Burundi, Tanzania , South Sudan , Uganda, Ethiopia, Rwanda, Democratic republic of Congo and some cultivated part of Egypt.

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

the answers is b.   environments.