Tina was really excited about going to Yellowstone National Park. She had heard so much about the geysers, the bison, the water, and the mountains! As the day of the trip approached, Tina spent days dreaming about the park. Her grandmother was also joining them on the trip, and Tina could not be happier. It was the night before the trip, and Tina was too excited to sleep. She did not even hear her grandmother asking her to double-check the suitcase. "Have you packed warm clothes?" Grandma Rose had asked. "You never know about the weather up there." "Uh huh," Tina had replied without listening. Although she remembered her grandmother saying that it could be cold in Wyoming during June, Tina had not paid attention. Time had flown by too fast. Tina tried her best to keep up with her family at the airport. Before she knew it, Tina found herself checking in to the hotel. "All right, girls, it is supposed to snow this afternoon. Wear your hats and gloves and meet us in the lobby after you have freshened up," Tina's mother instructed her three girls. It was at that moment that Tina realized she might have forgotten to pack warm clothes. Suddenly, she felt a cold breeze passing through the half-open window in the hotel room. She could see flurries of snow slowly falling from the sky. "But, it's June!" she told herself in vain. "You can borrow my scarf," Robin, Tina's oldest sister, offered, "and my gloves." "I knew you might forget to pack your jacket," Grandma Rose slowly uttered as she waltzed into the girls' room. "I had extra room in my suitcase just in case you actually did!" She was holding everything Tina needed to brave the snow in Yellowstone.
How does the setting contribute to the theme of the passage?