Answer:
He wanted to inform readers about what he saw and learned on his journey.
Step-by-step explanation:
Marco Polo was a traveler who traveled from Europe to Asia. At the age of seventeen, Marco left for the voyage to Asia. He is considered as the world's first travel writer. His travelogue contains the details of his journey and of what he saw on his voyage. The "Travels of Marco Polo" is the title of his travelogue. It was originally titled as "The Description of the World". The credibility of his travelogue is doubted as he wrote about such places that were never found to exist.
The purpose of Polo's writing travelogue was to inform his readers about the things and places he went and saw and things that he learned.
So, the correct answer is third option.