Correct Option: C. Flow into Ehoma and other lakes Explanation of the Correct Answer: The streams flowing from the eastern part of the area do not reach the Cross River primarily because they flow into local lakes, such as Ehoma Lake, instead of continuing their journey to the Cross River. This phenomenon can be attributed to several geographical and hydrological factors:

1. Topography and Drainage Patterns: The landscape in the eastern part of the area may have a topography that directs water flow towards these lakes rather than towards the Cross River. The elevation and slope of the land can significantly influence the direction in which streams flow. If the land slopes down towards the lakes, the streams will naturally follow that path.
2. Hydrological Cycle: In some regions, especially in areas with significant rainfall, streams may fill up local depressions or basins, forming lakes. If the streams are diverted into these lakes, they will not have enough flow or pressure to continue towards the Cross River.
3. Water Balance: The streams may also be influenced by the water balance in the area. If the lakes are large enough to capture the flow of the streams, they can effectively act as a sink, preventing the water from reaching the Cross River.
4. Ecological Factors: The presence of lakes can create a unique ecosystem that attracts water from surrounding streams. This can lead to a situation where the streams are absorbed into the lakes rather than flowing downstream.

Why the Other Options are Incorrect:

• Option A: Are remnants of streams captured by the Cross River
• This option suggests that the streams were once part of the Cross River but have been captured by it. However, this is misleading because if streams were captured by the Cross River, they would likely flow into it rather than being diverted away. The term "captured" implies a change in flow direction, which does not align with the observed behavior of the streams flowing into lakes.
• Option B: Disappear underground into the underlying limestone rocks
• While it is true that some streams can disappear underground, especially in karst regions where limestone is prevalent, this is not the primary reason for the streams in this scenario. If the streams were disappearing underground, there would be no visible flow into lakes, and the streams would not be observed at all. The context of the question indicates that the streams are still flowing, just not reaching the Cross River.
• Option D: Disappear into swamps
• Similar to option B, while streams can flow into swamps, this option does not accurately describe the situation. Swamps typically retain water and can absorb streams, but the question specifies that the streams are flowing into lakes, which is a more definitive endpoint for the water flow. Swamps may also not provide a clear explanation for why the streams do not reach the Cross River, as they could still potentially flow into it after passing through a swamp.

Summary for Revision:

• The streams from the eastern area flow into local lakes (like Ehoma) instead of reaching the Cross River.
• Topography and drainage patterns direct water flow towards these lakes.
• The hydrological cycle and water balance can lead to streams being absorbed by lakes.
• Other options (A, B, D) do not accurately explain the observed behavior of the streams.