Answer:
D. Exploration
Explanation:
Marco Polo was known for his exploration activities. He is European from Venice, who traveled all the way to Asia, where he mingled with the Chinese and Mongols. Together with his father and uncle, he traded on what was known as the silk road, a 5000-mile trade route between Europe and Asia.
Hence, it can be concluded that Marco Polo traveled to Asia As gold, God and glory are reasons for EXPLORATION.
The westward expansion era deals with the activity of the settlers into the American West. Hence, this is not the correct answer.
Civil war era deals with the American Civil wartime, between the Union and Confederates. Hence, this is a wrong answer.
American Revolution era is about the war between the Americans and Great Britain that led to American independence. This is a wrong answer as well.
