What can you infer about the strength of a magnetic field based upon the position of the iron fillings?

i think its

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.