What is the main theme of the excerpt A. the stress of travel

The main theme of the excerpt is ' They show that the author wants to inform readers by describing the old sugar estates.'

Explanation:

In the excerpt, the writer described his visit to Guyana to have a look at his old house. Upon his visit, while travelling towards his house, his car passed the old sugar estates. He looked at the wide array of sugar cane crops there.

He realized that sugarcane was the main crop on which the business of this country relied. It reminded him of the role of his grandfather in the production of beet sugar. The main purpose of the excerpt is to show how a family got into the sugar business.