Which evidence best indicate that a landscape has been eroded primarily by streams?

Evidence that a landscape has been primarily eroded by streams includes the presence of v-shaped valleys, which are characteristic of river erosion, and the development of features like riverbanks and meanders. Additionally, sediment deposition patterns, such as alluvial fans or deltas, can indicate the influence of flowing water. The presence of rounded rocks and smooth surfaces along streambeds also suggests the action of flowing water in shaping the landscape.