Here are some examples of strong verbs, i hope this helped
It's either Jack, or Roger.
Jack is the one who kills the pigs(who symbolically represent Piggy), which later orders to kills Piggy.
But Roger is the one who drops the rock on PIggy.
But the better answer would be Jack
The answer would be C I am 100% sure of that.
The car was washed by Dad.
This is the passive voice.