WHICH OF THE FOLLOWING IS THE BEST TITLE FOR THE PASSAGE

21. - File thứ 4: De 45p- hk2- b1- E 11
File thứ 4: De 45p- hk2- b1- E 11
21. Which of the following is the best title for the passage?A. How Ecosystems Work Better B. The Loss of BiodiversityC. The Variety of Species D. Natural Mechanisms