Which characteristic describes an old river? a. has no meanders b. has a low stream gradient c. has no tributaries d. is near headwaters

The right option is; B. Has a low stream gradient

Has a low stream gradient is the characteristic that describes an old river.

A river is a large, natural and often winding stream which carry water down from higher areas to a lower point, ending at an ocean or in an inland sea. Some rivers are young while some are old. Rivers possess different features as they age. Old rivers usually have a low stream (gentle) gradient and low erosive energy. They usually have broad U shape, the water is usually brown and they have flood plains. Seasonal floods are also common.

the europeans in the caribbean colonies had to turn to africans to replace the native peoples as slave it would be letter a

(4,-2)

explanation:

6x+4y=16

-6x-9y=-6

-5y=10

y=-2

x=4