The place where a river begins.

The place where a river begins.

• A. Source
• B. Store
• C. Recharge
• D. Sediment

Answer: (A)

The starting point of a river is its source. This is the place where water first forms a stream—often high up in the hills or mountains from rain, springs, or snowmelt—and from which the river flows downstream. It’s the opposite end of the journey from the mouth, where the river ends in a sea or larger body of water. The other terms don’t describe where a river begins: storage refers to water held in a reservoir or groundwater, recharge is the process of adding water to aquifers, and sediment is the material carried by the river. So the source is the best answer because it identifies where the river begins.

The starting point of a river is its source. This is the place where water first forms a stream—often high up in the hills or mountains from rain, springs, or snowmelt—and from which the river flows downstream. It’s the opposite end of the journey from the mouth, where the river ends in a sea or larger body of water. The other terms don’t describe where a river begins: storage refers to water held in a reservoir or groundwater, recharge is the process of adding water to aquifers, and sediment is the material carried by the river. So the source is the best answer because it identifies where the river begins.