Which of these foods is a berry with a single large seed in the botanical sense?

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In the botanical sense, the avocado is a fruit since it develops from the ovary of a flower and contains a seed. It is generally classified as a berry, despite its large core. Its lipid-rich flesh distinguishes it from many sweet fruits and explains its frequent use in savory preparations. Eggplant, zucchini and cucumber are also botanical fruits, even if they are treated like vegetables in cooking. The old list therefore had four possible answers; replacing the distractors with real, non-fruit plant organs makes the issue indisputable.