Which of the following is an interaction is responsible for the force of attraction between the particles in a salt crystal?
a) proton-proton
b) proton-electron
c) neutron-electron
d) electron-electron

option B) proton-electron.

The particles inside a salt crystal are ions. The electrostatic attraction between the positive ions are the negative ions is responsible for the crystal structure. In last stay, the protons are responsible for the positive charge and the electrons for the negative charge. Then you can say that the interaction proton-electron is responsible for the force of attraction between the particles in a salt crystal.

Bis the answerhope it !