As learning and trade progressed, the medieval structure began to break down. true or false?

TRUE

Explanation:

The medieval structure was created as a way to protect from the barbaric invasions after the Roman Empire ended and people were left without the Roman Military to protect them. The base of the Medieval structure was that close system which people lived inside walls and worked for the owner of the land as an exchange for protection. But once trade started to progress the world began to expand and people started to have contact with other countries and other cultures, which broke the main reason for the medieval structure.

the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation.