Which is the most important contribution made by the Tennessee-Tombigbee Waterway to the economic life of the Tombigbee Hills region? It deposits heavy red clay soil. It provides large amounts of valuable gemstones. It allows for a large amount of seafood harvesting. It allows for transportation of goods to other river systems. HURRY I NEED HELPP

Why are constitutions, both federal and state, necessary for our government?

56: 58 the assembly line was a system through which items were mass-produced in a flow.

Which of these would be most useful in studying the effect of germs exchanged between the new and old worlds? a. a graph showing the number of europeans between 1492 and 1600. b. a graph showing the number of native americans between 1492 and 1600. c. a primary source description of the symptoms of an unknown disease affecting native americans in 1492. o d. a primary source description of the symptoms of an unknown disease affecting europeans in 1492.