William gilbert used a terella in an attempt to explain .
a. unlike poles of a magnet attract.
b. why compasses point toward the north and south poles of the earth.
c. the properties of lodestone.

William Gilbert used a terella in an attempt to explain : B. why compasses point toward the north and south poles of the earth
Terella was used in earlier time to simulate earth magnetosphere before it was replaced by computers

hope this helps

William Gilbert used a terella in an attempt to explain .

Out of all the options shown above the one that best represents the explanation that William Gilbert was trying to make by using a terella was answer choice B) why compasses point toward the north and south poles of the earth. He used a terella in an attempt to explain his theory that the Earth is a giant magnet.

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Ithink the answer may be (b)