Penelope, You're a Tree

Penelope's heart was beating so fast she was certain they could hear it on the other side of the door. She'd always had trouble solving riddles. Hopefully that wasn't the case with her new friend in the cloak. The four questions were actually riddles. In summer, I am dressed. In winter, I am naked. What am I? Penelope found herself beaming from ear to ear. Though his jaw was clenched and beads of sweat were popping up on his forehead.