Concept:Expanded polystyrene protects fragile objects by absorbing shock through compression.
Explanation:Polystyrene is converted into a lightweight foam for packaging.
Although this foam has low density and is light, its key packaging property is its ability to compress.
When an impact or sudden force occurs during transportation, the foam’s cellular structure collapses slightly.
This compression absorbs the shock energy, preventing it from reaching the fragile item.
Thus, high compressibility is the reason it is widely used for protecting delicate objects.
Answer:D. high compressibility