Which item is essential for ensuring cargo safety during transport?

Cargo covers play a critical role in ensuring the safety of cargo during transport by protecting it from environmental factors such as rain, wind, and debris. When cargo is properly covered, it helps to prevent moisture damage, keeps the cargo secure from shifting during transit, and reduces the risk of goods falling off the vehicle. Additionally, cargo covers can deter theft by concealing valuable items from view, further enhancing security.

While the other items listed have their own importance—fuel efficiency contributes to overall operational costs, puncture-resistant tires can enhance safety and reduce the chance of blowouts, and power steering improves vehicle maneuverability—none of these directly addresses the protection and security of the cargo itself. Therefore, cargo covers are essential for maintaining the integrity and safety of the cargo being transported.