Arrange the following features formed by rivers in its course starting from upstream: 1. Meanders 2. Falls 3. Delta 4. Oxbow Lake Select the correct answer using the code given below:

The course of a river is divided into upper, middle, and lower stages, each characterized by specific landforms. Starting upstream in the upper course, vertical erosion dominates, creating features like waterfalls (falls) and V-shaped valleys [1]. As the river moves into the middle course, lateral erosion becomes more prominent, leading to the formation of meanders [1]. Over time, intense erosion at the neck of a meander loop causes the river to cut through, abandoning the loop to form an oxbow lake. Finally, in the lower course, the river's gradient becomes very flat, and extensive deposition at the mouth results in the formation of a delta [1]. Therefore, the correct sequence from upstream to downstream is Falls (2), Meanders (1), Oxbow Lake (4), and Delta (3).

Sources

1. [1] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 5: Landforms made by Running Water > THE LOWER OR PLAIN COURSE > p. 53