(i) - W - Asia
X - Atlantic
Y - Prime or Greenwich meridian
(ii) The earth experiences the force of gravity pulling towards the centre which creates a rounding effect on its shape.
The North and South poles experience centripetal force which constantly pull towards each other causing the flattening at the poles.
At the equator, the earth experiences the centrifugal force which causes the bulge
johnmulu answered the question on September 30, 2017 at 07:24
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