Sepals protect flower buds before blooming

Steps:

• Identify flower parts: sepals form the outermost calyx layer.
• Recall sepal role: they enclose unopened buds like green leaves.
• Compare functions: sepals shield inner parts from damage, unlike colorful petals.
• Confirm via botany: sepals prevent desiccation and injury in bud stage.

Why C is correct:

• By definition, sepals are protective structures in the calyx that enclose and safeguard developing flower buds from environmental harm until opening.

Why the others are wrong:

• A: Petals attract insects with color and scent, not sepals.
• B: Stamens (anthers) produce pollen, not sepals.
• D: The stigma receives pollen, not sepals.

Final answer: C