Final answer:
The term 'vengeance' is synonymous with 'revenge,' meaning to inflict harm in return for a wrong experienced. So, the correct answer is a) revenge.
Step-by-step explanation:
The word vengeance corresponds to the meaning of revenge. Vengeance is the act of inflicting harm in return for a perceived wrong.
Therefore, option a) revenge matches the word 'vengeance' more closely than the other options, which convey meanings of forgiving or showing compassion.
So, the correct answer is a) revenge.