Starting from the centre of the earth having radius R , the variation of g (acceleration due to gravity) is shown by

Step-by-step solution

Acceleration due to gravity at a depth d below the surface of the earth is given by aligned g_ depth & =g_ surface (1- d R ) & =g_ surface [ R-d R ]=d_ surface ( r R ) aligned Also, for a point at height h above surface, g_ height =g_ surface [ R^2 (R+h)^2 ] Therefore, we can say that value of g increases from centre to maximum at the surface and then decreases as depicted in graph (b).