What is the point where a river begins?

What is the point where a river begins?

• A. Mouth
• B. Source
• C. Ox Bow Lake
• D. Plunge Pool

Answer: (B)

The point where a river begins is its source, also known as the headwaters. This is the origin of the river’s flow—the place where water first collects and starts moving downslope, often in high ground from springs, snowmelt, or rainfall. From the source, the river travels downstream and gathers more water as it goes. The mouth is the opposite end, where the river finishes by flowing into the sea, a lake, or another river. An oxbow lake forms from a cut-off meander along the river’s course, and a plunge pool is a deep pool at the base of a waterfall or where turbulence erodes the bed. So the starting point is the source.

The point where a river begins is its source, also known as the headwaters. This is the origin of the river’s flow—the place where water first collects and starts moving downslope, often in high ground from springs, snowmelt, or rainfall. From the source, the river travels downstream and gathers more water as it goes. The mouth is the opposite end, where the river finishes by flowing into the sea, a lake, or another river. An oxbow lake forms from a cut-off meander along the river’s course, and a plunge pool is a deep pool at the base of a waterfall or where turbulence erodes the bed. So the starting point is the source.