Correct Answer: remorse

Solution : The correct choice is the fourth option .

In the given sentence, the word compunction is used to describe the hunter's lack of remorse or guilt after killing the tiger.

The meanings of the other words mentioned in the given context are:

• Pressure : This refers to force or influence applied to achieve a certain result. It doesn't convey a sense of regret or guilt.
• Compulsion : While this is related to a strong urge or impulse, it doesn't precisely capture the emotional aspect of feeling guilty or remorseful.
• Pleasure : This is the opposite of what is intended in the sentence. The hunter didn't feel pleasure; instead, the sentence suggests a lack of remorse.
• Remorse : This refers to a deep sense of regret and guilt for one's actions, which aligns with the hunter's emotional state in the sentence.

Therefore, the most appropriate synonym is remorse , emphasising the hunter's lack of regret after killing the tiger.