Which of the following materials can dump trucks haul?

Dump trucks are specifically designed for transporting loose bulk materials. This includes a variety of aggregates such as sand, gravel, and crushed stone, which can be easily loaded and unloaded through the truck's hydraulic system. The engineering and design of a dump truck make it ideal for this type of cargo, allowing it to deliver materials for construction, landscaping, and other applications efficiently.

The primary function of a dump truck is to handle materials that can be dumped out of the truck bed, confirming that loose aggregate is the correct choice among the options. The hydraulic action raises the bed at a specific angle, allowing the material to slide out smoothly at the desired location. This makes dump trucks particularly valuable on job sites where rapid unloading is required.

Other materials, while they might technically be transported, are not the primary intended uses for dump trucks. For example, furniture requires careful handling and typically involves different types of vehicles designed for safe transportation without damaging the cargo. Likewise, transporting animals may necessitate special containment to ensure their safety and compliance with regulations. Vehicles also require specific transport methods, often utilizing car haulers or tow trucks for safer movement. Thus, loose aggregate stands out as the material best suited for the capabilities of dump trucks.