Which of the following is NOT a common type of urn for cremated remains?

The correct answer is related to the classification of urns commonly used for cremated remains. Traditional urns, biodegradable urns, and decorative urns are all widely recognized categories. Traditional urns serve as durable containers for ashes, often made from materials like ceramic or wood. Biodegradable urns are designed to break down naturally in the environment over time and are often used for environmentally conscious funerals that contribute to nature. Decorative urns focus on aesthetics and can be personalized to reflect the tastes or interests of the deceased.

In contrast, metallic urns with in-built speakers represent a more niche or innovative option that does not fall into the standard categories. Such urns may be designed for specific purposes, such as memorializing through music or voice recordings, but they are not commonly recognized as a standard type of urn in the context of funeral service merchandising. The presence of technology, like built-in speakers, signifies a departure from traditional urn designs, making this choice the one that does not belong among the common types of urns for cremated remains.