What happens to the gravitational force between two objects when the distance between them increases by 3 times?

A. The force decreases to 1/9 of its original value
B. The force decreases to 1/3 of its original value
C. The first doubles
D. The force triples

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling

Pe = 1/2k(x)^2  and .05n/m = .05x10^-9m = x