<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>
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Your question: The core of a city, which is primarily based on commercial activity, is called the ____________.
Your answer: The core of a city, which is primarily based on commercial activity, is called the central business district.
Hope this helps! :3
The sun rises due east and sets due west.
Large bodies of water<span> such as oceans, seas, and large lakes </span>affect<span> the </span>climate<span> of an area. </span>Water<span> heats and cools more slowly than land. Therefore, in the summer, the coastal regions </span>will<span> stay cooler and in winter warmer. A more moderate </span>climate<span> with a smaller </span>temperature<span> range is created.</span>