Decorations displayed in a public space must meet which of the following criteria?

The correct response centers on the safety requirements for decorations in a public space. Decorations must be constructed from non-combustible materials or materials that are flame-resistant to minimize the risk of fire hazards. Using such materials is essential in ensuring that any potential ignition source does not lead to the rapid spread of fire within the space. This criterion is in line with fire safety regulations and standards meant to protect occupants and ensure overall fire safety within buildings.

While other options may include practical considerations, they do not address the fundamental safety concerns that are paramount in public spaces. For instance, lightweight materials or specific placement might be advantageous for logistical reasons, but they do not inherently contribute to fire safety, which is critical in preventing and mitigating fire risks.