Correct Answer: The little girl said that that bicycle was hers.

Solution : The correct choice is the fourth option.

When converting direct speech to indirect speech, pronouns need to be changed to reflect the perspective of the reporting speaker.

Narration Conversion:

• The first-person pronoun mine in the direct speech becomes the third-person pronoun hers in the indirect speech.
• The reporting verb said remains the same.
• The inverted commas are removed and that is used to introduce the reported clause.
• The pronoun this changes to that in the indirect form.
• The simple present tense (is) is changed to the simple past tense (was) .

Therefore, the correct indirect form is: The little girl said that that bicycle was hers.