Answer:
The author included information about the dry climate to inform the readers that why people in that region had to free their animals.
Step-by-step explanation:
"The Travels of Marco Polo" is a travelogue of Marco Polo. He was a Venetian Mercant who traveled from Europe to Asia between 1271 to 1295.
In his travelogue, he includes the information about the dry climatic condition in chapter 8, to inform the readers that why people in that region had to set their animals free.
He describes the climatic condition of that region to be so dry that it would kill them. Because of the harsh dry climatic condition they had free their animals as it had the possibility of killing them too.