Question: Smaller tributary glaciers, like tributary streams, flow into the main glacier in their own shallower U-shaped valleys.  Having read the above passage, choose the right answer to the following question (choices are the valley would be shallower or the valley would be deeper ):   What would happen to the size of the valley created by a tributary stream if the size of the stream were to be increased the valley would be shallower or the valley would be deeper?
Answer:
the valley would be deeper