Correct Answer: Shilpi said to her father, "Please let me join the school trip to Ooty next week."

Solution : The second option is the correct choice.

The steps of construction are as follows:

• The reporting verb "requested" is changed to "said" in the direct speech.
• The verb "help" is changed to "to + infinitive" form in the direct speech.
• The third-person pronoun "her" is changed to the first-person pronoun "me".
• The time phrase "following week" is changed to "next week".
• The words of the speaker are enclosed in the inverted commas.

Therefore, the correct answer will be: Shilpi said to her father, "Please let me join the school trip to Ooty next week."