which is the most Important contribution made bye the tennesse tombigbee waterway to the economic life of the tombigbee hills region

The Tennessee-Tombigbee Waterway's greatest important impact to the Tombigbee Hills province's economic life is that "it provides for the movement of products to other major rivers."

Explanation:

The Tennessee–Tombigbee Waterway connects commercial transportation in the United States from the middle of the country to the Gulf of Mexico. The waterway's main characteristics include 377 kilometres of drainage channels, a 53-meter cut between both the Tombigbee and Tennessee rivers' basins, and 10 locks and bridges.

to extend a country’s power and influence

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.