Final answer:
Meanders, floodplains, and river terraces are typically associated with low-gradient rivers due to the slower water movement which enhances sediment deposition and shaping of the landscape over time.
Step-by-step explanation:
Meanders, floodplains, and river terraces are commonly found along low-gradient rivers. As a river flows away from its source, it widens, the current slows, and the temperature may increase. Due to the lower gradient, there is less energy in the water flow, causing it to meander more.
Furthermore, the slower movement results in more deposition of sediments along the inner bends of the river, leading to the formation of meanders. The same process, coupled with periodic flooding, creates floodplains, which are flat areas surrounding the river.
Over time, as the river carves out deeper channels, it can leave behind elevated benches known as river terraces. These formations are part of the river's natural evolution as it moves sediment and shapes the landscape over which it flows.