Which type of wildland fire apparatus is designed to transport water to the scene of a wildland fire?

The correct choice is a water tender, which is specifically designed for the purpose of transporting large quantities of water to wildland fire scenes. Water tenders often have a significant water-carrying capacity and can refill other fire apparatus on site. This is crucial in areas where water supply may be limited or when firefighters are fighting wildland fires far from hydrant systems.

In contrast, structural apparatus are typically designed for urban firefighting and may not be equipped for the demands of wildland areas. Brush trucks are specifically intended for fighting wildfires and may incorporate firefighting equipment and capabilities, but they do not primarily serve the function of transporting water in bulk. Tillered trucks are maneuverability-focused and used for navigating tight spaces in urban environments, but like structural apparatus, they are not primarily intended for transporting water to wildland fire situations.