Answer:
Ben had used his right to defend himself, i.e., self-defense.
Step-by-step explanation:
The right of Self-defense means that one person has the power and authority/right to defend for his own life, if he finds threat of being harmed by another person. The law has given right to self-defense to people in cases if they find such threats.
In the given instance, Mike had tried to swing at Ben, whereas, Ben in his self-defense shoved Mike, because he found threat of being harmed by Mike.