The purpose of paragraph 3 is to show that the death of many birds is not caused by natural factors but by avoidable accidents.
- Many birds have been reported to die when they accidentally hit glass windows, unable to differentiate free air spaces from glass windows.
- This situation worsened at night when the city’s artificial lights further disorient birds who are somehow attracted by the lights.
Thus, the main purpose draws people's attention to how they can avoid endangering birds by working on the deceptive glass windows and finding ways to dim city lights at night.
Read more about birds that die at https://brainly.com/question/20432364
