Solution: Let's analyze the given options: - Apple, Orange, and Pineapple are all fruits that grow on trees. - Tomato, while botanically a fruit, is often categorized as a vegetable due to its culinary use. Thus, Tomato is the odd one out because, unlike the others, it is commonly treated as a vegetable. Therefore, the correct answer is 4 . Quick Tip When identifying the odd one out, pay attention to categories such as botanical classification versus culinary usage, as these can often differentiate similar items.