What is a columbarium primarily used for?

A columbarium is specifically designed for the accommodation and storage of cremated remains. This structure typically consists of multiple niches, where urns containing the ashes of the deceased can be securely placed. Its primary purpose is to provide a respectful, dignified space for families to memorialize their loved ones after cremation.

In contrast, the other options pertain to different aspects of funeral service. While an interment of burial remains is typically associated with cemeteries or grave sites, memorial services reference venues where families gather to honor the deceased. Storing funeral supplies pertains to practical aspects of the funeral home operations, which is separate from the intent and purpose of a columbarium. By focusing on the specific function and design of a columbarium, it's clear that the correct answer emphasizes its role as a dedicated space for the remains of those who have been cremated.