What type of cushioning is used specifically for protecting items during air transport?

The correct choice highlights the use of suspension systems, which are particularly designed to protect items during air transport. Unlike traditional cushioning methods, suspension systems provide a supportive structure that can absorb shocks and impacts effectively. This is crucial when transporting items by air, as the conditions can involve rapid changes in pressure, various levels of turbulence, and handling that can be harsher than other transport modes.

Suspension systems typically use materials and designs that allow the enclosed items to "float" within the packing container. This setup minimizes direct contact with the container walls and absorbs impacts from any jolts or drops, ensuring that delicate items remain secure during flight.

Other cushioning materials like peanuts, foam padding, and bubble wraps do offer some level of protection but may not be as effective in the specific circumstances of air transport where dynamic forces can be significant. They often work best for ground transport scenarios where the handling and environmental factors differ.