(A) Gravitational field (X)
(B) A lot of metal deposits on North and South Poles (X)
(C) Due to attraction of North Pole and repulsion of West Pole (X)
(D) Earth is a huge magnet (✔)
Answer: The magnet always points in the same direction, if allowed to move freely i.e. towards North and South poles, because of Earth is a huge magnet.