Select the option that expresses the given sentence in passive voice.

The boy's cricket ball broke the neighbour's window.

The neighbour's window was broken by the boy's cricket ball.

The correct passive form of the given sentence is The neighbour's window was broken by the boy's cricket ball.

The active voice of the sentence is The boy's cricket ball broke the neighbour's window. This sentence is in the simple past tense, which is used to describe an action that happened in the past. The passive voice of the sentence is formed by putting the subject of the active sentence after the verb "to be" and the past participle of the main verb. In this case, the subject of the active sentence is "neighbour's window" and the main verb is "break." The past participle of "break" is "broken." So, the passive form of the sentence is The neighbour's window was broken by the boy's cricket ball.

The other options are incorrect because:

• The neighbour's window is broken by the boy's cricket ball. is in the present tense, but the action of the ball breaking the window happened in the past.
• The neighbour's window had been broke by the boy's cricket ball. is in the past perfect tense, which is used to describe an action that happened in the past before another action happened. There is no other action mentioned in the sentence, so the past perfect tense is not appropriate.
• The neighbour's window was broke by the boy's cricket ball. is grammatically incorrect. The verb "to break" needs to be in the past participle form, which is "broken."