Choose the option that is the passive form of the sentence. The child…

The correct option that is the passive form of the sentence is The page of the book was torn by the child.

The other options are incorrect because:

• The book’s page is torn by the child is grammatically incorrect. The possessive pronoun "book's" should be "book" because the noun "page" is singular.
• The page of the book tore by the child is in the active voice.
• The page of the book is tearing by the child is in the present progressive tense, while the original sentence is in the simple past tense.