Correct Answer: strain

Solution : The correct answer is the third option.

Explanation: In the context of stress or pressure, "strain" is an appropriate synonym for "tension." Both words convey the idea of mental or emotional stress, difficulty, or discomfort. The grammatical hint involves recognising the semantic relationship between words and identifying a synonym that fits the specific context of the sentence.

The meanings of the other options are as follows:

• Comfort represents a state of ease or relaxation.
• Peace signifies a state of tranquilly or calmness.
• Detachment refers to a state of being emotionally or physically disconnected.

Therefore, the correct answer is strain.