Use the image to answer the question: what was the structure pictured above used for? to cross rivers on trade routes to deliver water from the hills into the cities to transport soldiers in the roman legions for public gladiator combat and chariot races

To transport water across cities

The correct answer as per the picture that can be seen, to the question: What was the structure pictured above used for, would be: To deliver water from the hills into the cities.

Explanation:

This structure that is shown on the picture is called an aqueduct bridge and since ancient Roman times they were built in order to garner the waters from rivers, and other water systems, and distribute them to the cities within the empire. It was a very efficient system of aqueduct and today there are many such aqueduct bridges that still stand. Examples are: the Aqueduct of Segovia and the Prestolee Aqueduct, among many others.

by improved communication.