Question

1. which of the following is the first step in river formation?water fills up the gully and remains there.water dries and leaves a slight gully behind.headward erosion causes a pit to increase in length.rainwater carves out a small gouge on a slope

Explanation:

River formation begins when rainwater, flowing over sloped terrain, erodes a tiny initial channel (gouge) in the surface. This is the foundational first step that precedes gully formation, headward erosion, and permanent water accumulation in the channel.

Answer:

D. Rainwater carves out a small gouge on a slope