According to Newton's law of gravitational, every particle of matter attracts every other particle. But bodies on the surface of Earth never move towards each other on account of this force of attraction. Why ?

Explanation

According to Newton's law of gravitational, the gravitational force between two particle//bodies of masses `m_(1)` and `m_(2)` placed distance `r` apart is
`F = (G m_(1)m_(2))/(r^(2))`
Since the masses of particles are very small, the gravitational attraction between them is too small tp produce any motion in them.
Due to the large mass of Earth, the gravitational attraction between the bodies and earth is quite large due to it, the bodies are attracted towards the centre of earth.