Concept:The sepal, which is the outermost whorl of a flower, protects the young flower bud.
Explanation:The floral parts are arranged in whorls: calyx, corolla, androecium, and gynoecium.
The calyx consists of small, green, leaf-like structures called sepals.
In the diagram, the part labelled I is the sepal.
Sepals enclose the other floral parts while the flower is still developing as a bud.
This covering shields the tender inner parts from mechanical injury, drying, and insect attack.
Therefore, the sepal is the part responsible for protecting the young flower bud.
Answer:A. I
