Which characteristic is typical of a young river?
a. is in a wide, u-shaped channel
b. has a low stream gradient
c. is near headwaters
d. has many tributaries

C. Is near headwaters

A young river is characterized by stream of water that is straight and narrow in width. The water of the young river is fast flowing and exhibit high stream gradient. It does not develop tributaries. A river head water is the source from where the river originated. A young river is typically closer to the site of its origination that is headwaters.  

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

explanation:

okay now i don't know this but for the pints nothing else to say bye