Answer:
The correct answer is A: valley.
Definition:
A valley is an area of low land between hills or mountains, often with a river or stream flowing through it.
Explanation:
Here is a detailed explanation of the answer:
- A valley is a geographical landform characterized by low-lying areas surrounded by higher elevations such as hills or mountains.
- Valleys are formed through various geological processes, such as erosion by rivers or glaciers, or through tectonic movements.
- Valleys are typically elongated and can vary in size from small and narrow to wide and expansive.
- The presence of a river or stream is a common feature of valleys, as they often serve as drainage channels for water runoff from the surrounding higher areas.
- Valleys can have different names based on their characteristics or location, such as river valleys, glacial valleys, or rift valleys.
- Valleys are important in terms of geography, ecology, and human settlement. They often provide fertile land for agriculture and are home to diverse ecosystems.
- Examples of famous valleys include the Grand Canyon in the United States, the Nile Valley in Egypt, and the Kathmandu Valley in Nepal.
In summary, a valley is an area of low land between hills or mountains, often with a river or stream flowing through it. It is an important geographical feature with various characteristics and plays a significant role in shaping landscapes and supporting ecosystems.