How does the writer use contrast to discuss the social conditions

Because of their stubbornness, grandmother and granddaughter participate in a rivalry in which each tries to prove that her world is superior. Daduh has the wonder and beauty of the natural world on her side, but her granddaughter has all the technological wonders of the urban world. Da-duh is frightened of the trappings of the modern world; in the truck, driving through Bridgetown, she clutches the narrator's hand tightly. Once back in the country, among the sugar cane fields, she feels safe and comfortable again. The granddaughter, a child of one of the most vibrant cities in the world, is unimpressed by these sights, however. To her, the sugar canes, which have sustained the Barbadian economy for hundreds of years, are only giant weeds. Da-duh and the narrator spend most of their days together walking around the land. Da-duh points out all the amazing sites of the islan; the fruit-bearing trees and plants, the tropical woods, the tall royal palm. Each of these objects that are so precious to Da-duh come from the natural, rural world and represent the agricultural tradition of Barbados. In response to Da-duh, the narrator shows off the dances she learns from the movies and the songs that play on the radio. She brags about all the machines and technology New York offers, kitchen appliances, trolleys and subways, electricity, and technology of the urban, modern world. She finally wins the rivalry by telling Da-duh about the Empire State building, which was the tallest building in the world at that time and hailed as a great wonder of architecture.