Correct Option: C. The steep, undercut bank associated with meander bends Explanation of the Correct Answer: The Cross River, like many rivers, exhibits various landforms and features as it flows through different terrains. One of the most significant features that can develop along riverbanks, particularly in meandering rivers, is the steep, undercut bank. This occurs due to the process of erosion, which is intensified in areas where the river bends or meanders.

1. Understanding Meander Bends:
2. A meander is a curve or bend in a river. As water flows, it erodes the outer bank of the bend (the cut bank) and deposits sediment on the inner bank (the point bar). This process is known as lateral erosion.
3. The outer bank experiences faster water flow, which increases the rate of erosion, leading to a steep, undercut bank. This is where the bank is eroded away at the base, creating a vertical or near-vertical face.
4. Formation of Undercut Banks:
5. As the river continues to meander, the undercutting can lead to the collapse of the bank, which can further change the course of the river over time. This dynamic process is a key characteristic of meandering rivers and is crucial for understanding river morphology.
6. Visualizing the Feature:
7. Imagine a river flowing through a landscape. As it curves, the water on the outside of the bend flows faster, eroding the bank. The bank becomes steep and may even have overhanging sections where the soil and vegetation have not yet collapsed into the river.

Why the Other Options are Incorrect: A. A ridge and valley topography: - Ridge and valley topography refers to a landscape characterized by alternating ridges (high areas) and valleys (low areas), typically formed by tectonic forces and erosion over long periods. This is not relevant to the specific features of a riverbank, especially in the context of meander bends. The Cross River's western bank does not demonstrate this type of topography; instead, it shows the effects of river erosion. B. A river capture in process: - River capture, or stream piracy, occurs when one river erodes through a divide and captures the flow of another river. This process is not directly related to the features observed along the banks of a river, particularly in the context of meander bends. The question specifically addresses the relief feature along the bank, which is not indicative of river capture. D. The development of an alluvial terrace: - Alluvial terraces are flat, raised areas adjacent to a river, formed by sediment deposition during periods of flooding or changes in river level. While alluvial terraces can be found along rivers, they do not describe the steep, undercut banks associated with meander bends. The question focuses on the immediate bank features rather than the broader sedimentary processes that create terraces. Summary of Key Points:

• The correct answer is C, as it describes the steep, undercut banks formed by erosion at meander bends.
• Meander bends lead to differential erosion, with the outer bank eroding faster due to increased water velocity.
• Ridge and valley topography, river capture, and alluvial terraces do not accurately describe the specific features of the Cross River's western bank.
• Understanding river dynamics and erosion processes is crucial for interpreting river landforms effectively.