Answer:
4). At the skyscraper, we watched them in action building their masterpiece.
Explanation:
As per the question, option 4 displays the sentence that is written in active voice as the subject/doer is accomplishing the action expressed by the verb in the sentence which is contrary to the sentence written in passive voice which involves a subject that receives the action or being acted upon(by the verb). Options 1, 2, and 3 emphasizes the object('the skyscraper visit', 'the museum', and 'those works of art') instead of the subject which implies that they are the recipient of the action. Thus, only option 4 contains the subject 'we' that is performing the action 'watched' rather then receiving it. Therefore, <u>option 4</u> is the correct answer.
They have realized how different they are
Obesity is a problem very difficult to get rid of because of all the junk they put in our food, obesity can cause heart problems and the heart is very important to the body
