Concept:Wind-pollinated flowers do not depend on attracting insects, so showy petals are not essential.Explanation:Wind pollination requires exposed anthers to release pollen and feathery stigmas to trap it from the air.The ovary is needed to develop into fruit and seeds after fertilisation.Thus, the anther, ovary, and stigma are all necessary reproductive parts.Petals mainly attract insect pollinators, not wind, so a flower can be pollinated by wind without them.Answer:D. Petal