<span>Erosion by rivers is a main valley-forming
process; other processes, such as movement of the earth's crust and
glaciers, also have an important part in some cases. The rate at which a
river deepens its valley depends on several factors.</span>
There are many reasons why people might travel to UK,here are a few:
First off, it has a rich history background. UK offers many historical site for tourist to visit, for example, the Roman Runes and the Stonehenge. It is common that people visit a place to see the historical sites.
Secondly, UK has it's own unique culture that attracts tourist. For example, the style of building like cottages and castle-like buildings in English styles. Another is the British royals,which attracts many tourist to pay a visit as well,because it is something they cannot find in their own countries.
Thirdly, there are great views and ladnscape. UK has well-known mountain ranges and hills, there are also farmlands,which is not something we can see everyday. Therefore people go there to experience the beauty of nature, to relax and take pictures.
Hope it helps!
It is called a drainage basin
