But first I had to trim away some of the shrubs growing up around the window frames . I trimmed other brush , too , because I was out in the yard working , anyway . Foul white flies and other winged pests flew up around me as I worked . I found a nest yellow - jackets in a hole by the apple tree , and killed them .

Question: What was the reason for killing the pests ?
Answer: They were eating the apples .I did n't want to get stung .None of the above choices .I wanted to protect the white flies .