A participle has the following form: verb + -ing, and the only word in this sentence that takes that form is A, 'flying', which is the correct answer.
Answer: The theme of Allied with green is You should respect and appreciate the environment especially plants. The idea of theme is to teach us a lesson but the theme was found on how Lucy acted or reacted on the topic of green
Explanation: I got the answer from google...
feels like the only thing you're doing is giving us your homework to do what you should be doing