Explanation: The Beas River is a significant tributary of the Indus River system, originating in the Himalayas in the state of Himachal Pradesh. It flows through the mountainous regions of Himachal Pradesh before entering the plains of Punjab. The river continues its course through Punjab and eventually drains into the lowlands of Punjab and Haryana.
Understanding the drainage pattern of the Beas River is crucial for several reasons:
1. **Geographical Significance**: The Beas River plays a vital role in the geography of northern India, particularly in the states of Punjab and Haryana. It contributes to the fertile alluvial plains of these regions, which are crucial for agriculture.
2. **Agricultural Importance**: The river's waters are extensively used for irrigation, supporting the agricultural activities in Punjab and Haryana. The lowlands drained by the Beas are some of the most productive agricultural areas in India.
3. **Hydroelectric Power**: The Beas River is also a source of hydroelectric power, with several dams and power plants constructed along its course. This contributes to the energy needs of the region.
4. **Ecological Impact**: The river's drainage system supports various ecosystems, including wetlands and forests, which are important for biodiversity and ecological balance.
The Beas River's course and drainage area are well-defined and have been studied extensively. It is important to note that while the river originates in Himachal Pradesh and flows through Punjab, its main drainage area is in the lowlands of Punjab and Haryana. This is why option C is the correct answer.
In summary, the Beas River's drainage into the lowlands of Punjab and Haryana is a key geographical feature that impacts the region's agriculture, economy, and ecology. Understanding this drainage pattern is essential for comprehending the broader geographical and environmental context of northern India.