Final answer:
All Kappa Delta chapters annually hold a philanthropic event called Shamrock, which supports child abuse prevention and the Kappa Delta Foundation.
Step-by-step explanation:
The philanthropic event held each year by all Kappa Delta chapters is known as Shamrock. The Shamrock event is part of their national philanthropic efforts, where proceeds typically benefit the prevention of child abuse in America and the Kappa Delta Foundation. This event is aligned with their historical commitment to various charitable causes and reinforces the sororunity's core values of giving back to the community.