Read this passage from the secret garden. then mary knew dickon had met the picture to be a message. he had meant that she might be sure he would keep her secret. her garden was her nest and she was like a missile thrust oh, how she did like that queer common boy! which theme is best developed by this passage? a. happiness depends on others b. the secret garden is a place for healing and growing. c. secrets are dangerous d. the secret garden is a magical place.