What happens to a stream’s channel as it meanders?

As a stream meanders, it develops a series of curves and bends within its channel. This meandering process is influenced by various factors including the water's velocity, sediment load, and the underlying topography. When the stream curves, more energy is directed sideways along the banks rather than just flowing forward. This lateral energy causes erosion on the outer bank of the meander and deposition on the inner bank, leading to the gradual widening of the stream channel and the changing of its path over time.

The concept of stream meandering is fundamental to understanding how waterways evolve and shape the landscape they traverse. Other options do not accurately describe the dynamics of a meandering stream. The valley does not remain flat as meanders can create changes in elevation due to erosion and deposition processes. A stream does not flow in straight lines when meandering, and it certainly does not flow through completely dry land, as meandering signifies the presence of flowing water within the channel. Thus, the correct choice reflects the nature of energy distribution within a meandering stream channel.