Which of the following can be described as carved by water?

Erosional landforms are indeed described as being carved by water, as they are formed through the process of erosion, which involves the wearing away of soil and rock by water flow. This can occur in various environments, such as rivers and streams, where the force of moving water over time can shape the landscape by removing sediments and carving out valleys, canyons, and other features. This process highlights the significant role that water plays in the sculpting of land surfaces.

In contrast, floodplains are flat areas next to rivers that are subject to flooding and aren't necessarily "carved" but rather formed through sediment deposition during floods. Moraine formations and drumlins are both landforms associated with glacial activity, created by the movement and melting of glaciers rather than by the direct action of running water. Thus, while these landforms have their own unique formation processes, they do not represent the erosional characteristics attributed to water.