Answer: B) Kevin’s science fair project was built in the laboratory.
Explanation: active voice is a form or set of forms of a verb in which the subject is typically the person or thing performing the action and which can take a direct object. On the contrary, passive voice is a form or set of forms of a verb in which the subject undergoes the action of the verb. From the given options, the one in which the verb has been changed to the passive voice, is the corresponding to option B, because the object (science fair project) is acting as the subject of the sentence.