Physics · GRAVITATION

In the given diagram, a point mass \( m \) is located at depth \( d \) from the Earth's surface. What fraction of the Earth's total mass \( M_E \) contributes to the gravitational force acting on this mass, assuming uniform density?

1. A
   \( \frac{R_E - d}{R_E} \)
2. B
   \( (\frac{R_E - d}{R_E})^2 \)
3. C
   \( (\frac{R_E - d}{R_E})^3 \)
4. D
   \( (1 - \frac{d^3}{R_E^3}) \)