V-shaped valley As the river erodes downwards the sides of the valley are exposed to freeze-thaw weathering which loosens the rocks (some of which will fall into the river) and steepens the valley sides. The rocks which have fallen into the river help the process of corrasion and this leads to further erosion.
Alright my friend the answer to your question will be true let's put an example in to inform why it is alright so say you and your cousin look a like that's because the genetics are similar but not exactly the same
