Final answer:
The correct answer is the consumption of low fat diets, as the other options given are directly linked to increased calorie intake, while the low fat diet option does not necessarily lead to increased energy consumption and is therefore an exception.
Step-by-step explanation:
The increase in energy consumption among American children over the last 25 years can be attributed to several factors, except for the consumption of low fat diets. This is because low fat diets, which are less satisfying, potentially leading to increased food intake, does not align with the other options that directly contribute to higher energy intake, such as eating more meals away from home, larger portion sizes, and more snacking. Increased physical activity is an essential part of combating obesity, as it helps burn more calories which is crucial for weight control.