Which statement best describes gravity according to Newton's law of universal gravitation?

• A. Any two masses attract each other with a force proportional to the product of their masses and inversely proportional to the square of the distance between their centers: $F=G\frac{m1m2}{r^2}$.
• B. Gravity between two masses is always the same constant force regardless of their separation: $F=G$.
• C. Gravity repels objects with greater mass more strongly, and the force increases with the square of the distance: $F=Gm1m2r^2$.
• D. Gravity acts only between charged objects and is independent of mass: $F=G\frac{q1q2}{r^2}$.

Answer: (A)