Correct Answer: The coach advised her first to relax thoroughly before the game started.

Solution : The correct choice is the fourth option.

Indirect speech, also known as reported speech or indirect discourse, is when you express what someone else has said without quoting them directly. The steps of conversion are as follows:

• The reporting verb "said" is replaced with "advised", and the pronoun "her" is retained.
• Rewrite what the coach said, maintaining the imperative nature of the original instruction.
• The tense is shifted from the present to the past, and the time expression is adjusted accordingly, resulting in "before the game started".
• Include the recipient of the instruction, which is "her" in this case.

Therefore, the correct answer would be: "The coach advised her first to relax thoroughly before the game started."