Listen to the narration about how chocolate is made, then answer the question. (Narrator): 'Many people love chocolate, but few know how it's made. The process starts with cacao pods, which grow on trees in tropical regions. After the pods are harvested, the beans inside are removed and fermented for about a week. This step is what removes the bitter taste. Next, the beans are dried in the sun, and then shipped to factories. At the factory, they are roasted, which is what truly develops that rich, complex flavor we all recognize as 'chocolatey.' Finally, the roasted beans are ground into a paste, which is the base for all chocolate products.' According to the speaker, which step is essential for developing the characteristic flavor of chocolate?

Listen to the story about a hiker, then answer the question. (Narrator): 'I was hiking alone on the mountain's north trail, a path I thought I knew well. But after a few hours, the trees looked unfamiliar, and the trail seemed to disappear. I checked my pockets for my phone, but the battery was dead. Then I realized I'd left my paper map in the car. The sun was getting low, and a chill was in the air. My heart started to pound. I forced myself to sit on a log, take a few deep breaths, and think. Panicking wouldn't help. I had to remember which way the sun was when I started.' What can be inferred about the speaker when they realized they were lost?

Listen to the explanation of a historical event, then answer the question. (Narrator): 'The 'Dust Bowl' of the 1930s was one of America's worst environmental disasters. For years, farmers in the Great Plains had been plowing up millions of acres of native grassland to plant wheat. This traditional grass had deep roots that held the soil in place. When a severe drought hit the region, the over-plowed soil, which no longer had the grass to protect it, turned to dust. Powerful winds then swept across the plains, picking up the loose topsoil and creating massive, black dust storms that buried homes and destroyed farms.' According to the narration, what was the primary cause of the soil turning to dust?

Listen to the audio tour of a museum exhibit, then answer the question. (Narrator): 'Welcome to the guided audio tour of the Starship 'Odyssey' exhibit. This spaceship was a marvel of its time, designed for a ten-year mission to explore distant galaxies. In front of you is the bridge, where the captain and crew commanded the ship. Notice the main viewscreen, which gave them a window to the universe. To your right is the hydroponics bay, a large glass-enclosed garden where the crew grew their own fresh food. The ship also had advanced medical facilities and a zero-gravity recreation area. However, it did not have personal teleportation devices; the crew relied on smaller shuttlecraft for short trips.' Which of the following features was mentioned as being part of the Starship 'Odyssey'?