Answer:
C: the force of electromagnetic.
Step-by-step explanation:
- Contact force: Contact force is the force which is caused by the contact of two macroscopic objects.
- Gravitational force: It is defined as the force of attraction between the two objects of masses and they are at certain distance.

- The force of electromagnetism: This is the force which is in between the charge particles whether the charge particles are moving or not.
- Push force: It is the force which is generated by pushing any object.
Therefore, by the above definitions the force of electromagnetism is the result from charge particles.