What was the significance of the closing of the silk road?

It encouraged Europeans to develop naval technology to help them find new ways to obtain Asian goods.

Explanation:

The Silk Road was a system of land routes for trading goods between China and the West (130 BCE-1453 CE). When it closed, merchants were compelled to develop naval technology to use the sea as a trade route. This event was fundamental for the Age of Discovery that would drive Europeans ships to explore, and ultimately invade, the New World of the Americas.

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.