<h2>Right answer:</h2><h3>Olivia se lava la cara</h3>
Se is the reflexive pronoun for the third person singular matching él (he) or ella (she). In Spanish, we use Reflexive Pronouns with a verb to point out that a person carries out an action to or for himself or herself. So here <em>Olivia </em>carries out the action for herself, that is, she washes her face. Finally:
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.