Final answer:
The phrase 'on the fence' means that Suzi can't decide what she wants. The variety in cultural foods and balanced diets can cause temporary digestive upsets when one moves to a new area as their digestive system adjusts to new dietary habits and ingredients.
Step-by-step explanation:
The phrase "on the fence" means that Suzi can't decide what she wants. In the context of choosing between Chinese food and Mexican food, Suzi is undecided, neither leaning towards one option nor the other. When considering cultural foods and regional diets, people often find a variety of foods that create balanced diets using locally available ingredients. This variety can lead to temporary digestive upsets when individuals move to a new area because their digestive systems need time to adjust to different types of foods, spices, or cooking methods. This can happen when moving between regions in the United States or to a different country, where dietary habits and ingredients commonly vary.