Reason: Vegetables include green vegetables, white radishes, carrots and eggplant, fruits include pears, apples, pineapples, watermelons and peaches, and sports equipment includes basketball and football.

The second method: triangle, circle and rectangle.

Reason: triangle: watermelon, eggplant, peach, circle: green vegetables, pineapple, carrot, white radish and rectangle: football, watermelon, pear, apple.