Correct Answer: The captain asked what they were doing on the pitch if they were not playing.

Solution : The correct choice is the fourth option.

Indirect speech, also known as reported speech or indirect discourse, is a way of reporting what someone else has said without quoting their exact words.

Narration conversion:

• Change the reporting verb from "said" to "asked," as the captain is asking a question.
• Change the first-person pronoun "we" to the third-person pronoun "they" to match the perspective in the reported speech.
• Change the verb tense from the present tense ("are not playing") to the past tense ("were not playing") to maintain the sequence of tenses.

Therefore, the correct answer is: The captain asked what they were doing on the pitch if they were not playing.