Which special marking is crucial for packages containing sensitive items?

The marking "Fragile" is crucial for packages containing sensitive items because it specifically indicates that the contents are delicate and can easily break or be damaged during handling and transportation. This marking alerts handlers and transport personnel to exercise caution while handling these packages, reminding them that improper handling or dropping may lead to significant damage. By clearly labeling items as fragile, it helps ensure they receive the appropriate level of care, minimizing the risk of loss or destruction. It's especially significant in logistics, where packages often go through multiple checkpoints and are handled by various individuals.

While other markings like "Keep Dry" or "Do Not Crush" also communicate critical handling instructions, "Fragile" directly addresses the vulnerabilities of sensitive items and commands attention to the potential risks involved with mishandling. Moreover, "Keep Upright" serves to maintain the orientation of the package rather than protect against breakage, which is why "Fragile" stands out as the most pertinent marking for items that are easily damaged.