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the picture below shows a floodplain alongside a river channel. a floodplain is a flat landform created by deposition on the bottom of a wide river valley.

over time, a river gradually shifts its position back and forth across a valley bottom. as it shifts, it drops sediment to gradually build up a flat floodplain.

as the landform's name implies, another process plays a role in floodplain formation. which of the following describes this process?

a) acid rain weathers large rocks until they form a broad, flat plain.

b) glaciers move through a river valley every winter and flatten out the landforms.

c) a river may flood its valley and form a permanent inland sea.

d) a river floods over its channel banks and deposits sediment on the wide valley bottom.

Aliquid is an answer i hope this

Answer: a charge of -1.0  × 10⁻⁴ c must be placed  at x = 26 m.the sign of the charge will be the same sign as the  -4.0  µc charge.======electricstatic force between two point charges  is given by    where k is coulomb's constant,  8.99×10⁹  n·m²/c², q₁ and q₂ are the point charges, and r is the distance between the two point charges.assign positive to q₁let q₁ =  6.0 µc, q₂ = -4.0  µc, q₀ represent the charge at the origin, and q₃ represent this new charge to place.the charge at the origin q₀ would experience the following force f₀₁ from q₁, with r = 6.0 m (note that 1  µc = 10⁻⁶ c)    the force from q₂    the force from q₃    the net force on the origin charge, q₀, has to be zero for no electrostatic forcehaving an equation where k and q₀ can be divided out of the equation will allow us to solve for q₃    isolating:     a charge of -1.0  × 10⁻⁴ c must be placed  at x = 26 m.the sign of the charge will be the same as the  -4.0  µc charge