Which corsage wiring technique involves inserting a wire through the calyx and bending it down along the stem?

The piercing method is the correct choice because it specifically involves inserting a wire through the calyx of the flower and then bending it down along the stem. This technique provides a secure attachment of the flower to the wiring, which helps in holding the flower firmly in place while still allowing for a natural appearance. The bending of the wire down the stem ensures that it is less visible and maintains the integrity of the flower's form.

In floral design, using the piercing method is particularly advantageous for delicate blooms, as it minimizes damage while providing stability. This method is often used for corsages and boutonnieres to ensure that the flowers remain elegantly positioned and can be worn comfortably.

Other wiring techniques have different methods of securing flowers. For instance, the hook method generally involves creating a small hook that can grasp the head of the flower without piercing it, while the hairpin method uses a bent wire to secure the flower without passing it through the calyx. The wrap method, on the other hand, involves wrapping floral tape or wire around the stems, which is useful for bunches but does not utilize the same piercing action. Each technique has its place in floral design, but for securing a flower directly through the calyx, the piercing method is the most effective.