Gravitational force is a fundamental force of nature that attracts two bodies with mass toward each other. It is defined as the force of attraction between any two masses, such as the Earth and an object near its surface, or between celestial bodies like planets and stars.
Among the options you provided:
A) Electrostatic force - This is the force between charged particles. B) Strong nuclear force - This is the force that holds protons and neutrons together in an atomic nucleus. C) Friction force - This is the force that opposes the relative motion of solid surfaces or fluid layers. D) Magnetic force - This is the force experienced by charged particles moving in a magnetic field.
Therefore, none of the options you provided correctly describe gravitational force. Gravitational force is distinct from all of these forces and operates according to the law of universal gravitation, as defined by Newton and later refined by Einstein in the context of general relativity.