Question

Which will have the most gravity on earth

Answer 1

Answer:
Arctic Ocean

Reason:
Gravity on the Earths surface varies by around 0.7% from 9.7639 m/s^2 on the Nevada Huascarán mountain in peru to 9.8337 m/s^2 at the surface of the Artictic Ocean.

Answer 2

It is the border between the rocky mantle and the metallic core, some 3,000 kilometers deep.