The main characteristic of the Yellow River is that it is clear.
The Yellow River which is also called Huang He is the second largest river in China and one of the longest river systems in the world.
The Yellow River was named because the waters carry silt which give the river its yellow-brown color.
Thus, the main characteristic of the Yellow River is that it is clear.
Therefore, the Option C is correct.
Read more about Yellow River
brainly.com/question/886061