Canals and aqueducts allow humans to
a. conserve water supplies
b. produce hydroelectricity
c. settle below river level
d. transport people and goods

Option: d. transport people and goods

Explanation:

Canals and aqueducts allow people to move one place to another. Canals are artificial (man-made) waterways built for transporting goods, and irrigation purposes. Canals play a key role in shortening the distances of voyages. Aqueducts are used to transport fresh water in the cities and heavily populated areas. During the Roman Empire aqueducts played a crucial role in bringing water into the main cities. Some famous aqueducts are Pont du Gard, Acqua Vergine and so on.

8

explanation:

4+4=8