Read the following context and choose the best option to answer the question.
Context: I saw a hummingbird , a female , I think , so I sat on the front porch to watch her and her mate take turns running patrol and eating . When I went to leave there were 4 birds . I think they were fighting over the feeders . That or it was two parents with babies about to leave the nest .
Question: Why would the narrator marvel at the scene on their porch ?
Options: 
A. None of the above choices .
B. The narrator loves the sights of trees .
C. The narrator loves seeing cars pass by .
D. The narrator is made curious by hummingbirds .


D