The correct option is D Seeds
Chicory powder which is used to add flavour to coffee is extracted from seeds. Common chicory, Cichorium intybus, is a somewhat woody, perennial herbaceous plant usually with bright blue flowers, rarely white or pink. Many varieties are cultivated for salad leaves, chicons or for roots, which are baked, ground and used as a coffee substitute and additive.
Therefore, the correct answer is option D.