Answer:
Petals, stamen, and sepals fall off because they are no longer needed by the plant.
Explanation:
Petals, stamen, and sepals are closely related to plant reproduction. Petals protect the reproductory parts of the plant and because the fruit needs to be funded by pollen they no longer need reproductive parts, they have achieved it and now are in the development stage to mature and provide seeds and create more plants. Stamen and sepals are the reproductory parts of the plant and they are no longer needed o achieve reproduction
