Which of the following best describes a decal on a container?

A decal on a container is best described as a self-adhesive, non-metallic marking that is permanently attached to the container. Decals serve various purposes, including providing important information, identification details, or branding for the container. The durability and adhesion of the decal ensure it remains intact during the container's use and transit, which is essential for maintaining clarity in communication regarding the container’s specifications or handling instructions.

Unlike removable tags or stickers, which can be easily taken off or replaced, a decal is designed for longevity and to be a permanent fixture. This characteristic distinguishes it from other options that describe temporary or non-adhesive forms of marking, such as tags or removable labels. Decals can withstand the environmental conditions and handling typical of shipping and storage, further emphasizing their functional role in container management.