The concept of "polarity" is due
1. the number of electrons shared by any pair of atoms.
2. one atom of a bonded pair of atoms exerting a greater attractive force on the shared electrons.
3. atoms that are bonded together but have unequal numbers of lone pair electrons.
4. the optimal lewis dot structure for any pair of atoms.

due to the interaction of the bonds between molecules and atoms with different electronegativities

Explanation:

The polarity of bonds is caused due to the interaction of the bonds between molecules and atoms with different electronegativities. ... Polarity in Chemistry is nothing but the concept of the separation of an electric charge leading a molecule to have a positive and negative end.

a is the answer to this question

explanation: