Final answer:
Young adults in the United States tend to consume a large number of calories from sugar-sweetened beverages, which contribute to nearly a quarter of their daily calorie intake. As global incomes rise, there is a trend towards consuming more fats and protein, and less carbohydrates. Despite a general decrease in food prices, healthier options like zucchini and lettuce remain significantly more expensive than calorie-dense foods like oil, butter, and sugar.
Step-by-step explanation:
Regarding fluid consumption in the United States, it is important to recognize the prevalence of calorie-rich beverages in American dietary patterns. Statistics from diet and obesity studies suggest that sugary drinks are a significant contributor to daily calorie intake. The latest National Health and Nutrition Examination Survey reports that about 50 percent of Americans consume sugary drinks daily. Additionally, this consumption contributes to almost 25 percent of daily food energy in young adults in the United States, a concerning fact considering these beverages largely provide energy without other nutrients.
Concerning the dietary trends and choices in the U.S., it is not older adults but rather young adults who tend to consume a greater number of calories from beverages. Energy-rich beverages, such as sugar-sweetened beverages, contribute significantly to the overall calorie intake, which has implications for obesity rates and public health.
Changes in the global food landscape also reflect that as incomes rise, people often desire more calories from fats and protein, as seen in countries like India, China, and the United States. Yet, despite a decrease in global food prices since 1875, certain healthful foods remain expensive compared to energy-rich and nutrient-poor options, making affordable, nutritious choices more challenging for consumers.