Respuesta :
A sentence which contains the viewpoint is "The overwhelming number of geese at the park has become unacceptable.".
Herein, the writer expresses his concern and at the same time his unacceptance towards such issue. Also, viewpoint refers to the circumstances which conduct an individual to have an attitude of mind. Therefore, such formation of attitude aids in taking a stance against any odd or to favor something.
Answer: D) The overwhelming number of geese at the park has become unacceptable.
Explanation: a viewpoint is a person's opinion about something. In the given paragraph from a letter, we can see the speaker complaining about the amount of geese at the downtown park, he says that the geese stole his and his family's lunches. The sentence that contains an example of a viewpoint is "The overwhelming number of geese at the park has become unacceptable" because in that by saying that it is "unacceptable" he is expressing his opinion.