Arboles y flores because those are the things that you find at the park. Libraries, cards, and computers are not related to the sentence. Trees and flowers are the complements.
The answer would be "Estoy escribiendo" because estan means they are, esta means he is, and estamos means we are, adn we are talking about something in first person and estoy means I am so this perfectly fits it
Hope this helps
Answer: how are you Mrs.Rodriguez
Explanation:
como is how estar usted is are you and i guess you know the last part
