Question

fruit or vegetable?
according to botanists, who study and classify plants, a fruit is the part of a plant that contains seeds. by this definition, not only melons and plums but zucchinis, green beans, and tomatoes are all fruits. in fact, based on this definition, any vegetable with seeds could be classified as a fruit. in contrast, nutritionists, who study diet, reserve the term \fruit\ only for sweet, fleshy fruits, using \vegetable\ for those that are low in fructose, or fruit sugar. vegetables are usually eaten as part of a meal, while fruits are often eaten as a snack or dessert. nutritionists argue that although tomatoes may be fruits from a botanical perspective, they arent eaten the way typical fruits are, so theyre vegetables. depending on who you ask, a tomato can be considered a fruit, a vegetable, or both.
what is the main, or central, idea of the passage?
tomatoes are scientifically classified as fruits, but they are not served the way other fruits are often served.
nutritionists consider plant parts that have seeds but are not high in fructose to be vegetables.
botanists consider all plant parts with seeds to be fruits, but nutritionists consider many of them to be vegetables.

Explanation:

The passage compares the classification of fruits (like tomatoes) by botanists (who define fruit as plant part with seeds) and nutritionists (who define fruit as sweet, fleshy and vegetable as low - fructose, often eaten as part of a meal). The third option captures this central idea of differing classifications between botanists and nutritionists. The first option focuses only on tomatoes' serving style, not the overall classification difference. The second option is just about nutritionists' view, not the comparison with botanists.

Answer:

Botanists consider all plant parts with seeds to be fruits, but nutritionists consider many of them to be vegetables.