Question

which structure is thick to protect some of the reproductive structures in flowers? (1 point) petal anther style sepal

Explanation:

Sepals are the outermost part of a flower bud. They are often thick and protect the delicate reproductive structures (stamens and pistils) inside the flower before it opens. Petals are mainly for attracting pollinators, anthers produce pollen, and the style is part of the female - reproductive structure for pollen tube growth.

Answer:

D. sepal