Select the most appropriate option to substitute the highlighted segment in the given sentence. If there is no need to substitute it, select ‘No substitution’.
He lost his heart because he could not cope with the difficult situation.

Correct option is D

The correct substitution for the highlighted segment in the sentence "He lost his heart because he could not cope with the difficult situation" is (d) "lost heart."

• Explanation: The phrase "lost heart" is the correct idiomatic expression, meaning to become discouraged or to lose courage. The phrase "lost his heart" is incorrect in this context, as it implies a different meaning, such as falling in love.
• Corrected Sentence: "He lost heart because he could not cope with the difficult situation."

This substitution corrects the idiom to properly reflect the intended meaning of losing courage in the face of a difficult situation.