How can you identify dangerous goods?

Identifying dangerous goods is essential for maintaining safety in air travel. The correct identification method involves the use of a diamond shape that features hazard identification symbols. This diamond shape is standardized in international regulations and serves to quickly communicate the type of hazard associated with the goods, such as flammable materials, corrosive substances, or toxic materials.

By employing these visual markers, flight attendants and ground staff can swiftly recognize any potential risks posed by the contents of a package or container. The symbols are designed to be universally understood, allowing for immediate recognition and appropriate action, which is crucial for safety during handling and transport.

The other options do not conform to the standardized marking system used for dangerous goods. A round shape with symbols, a rectangular shape with no markings, and a square shape with a picture do not provide the necessary standardized hazard communication needed for identifying dangerous goods effectively.