Identify the adjective clause and the word it modifies.
The tree whose branches had died had to be cut down.
is the question
The writer's world is another way of saying; "The scene that is being set for the story to be told. Time, Location, Characters, Mood, Situation, etc.
For example, If you were telling a story about Dungeons and Dragons, perhaps you would mention that the main characters, Corlon, a Fighter and Esmerelda, a Sorceress are Trapped in a Dragon's Cave guarded by a Large one-eyed Cyclops and a Very Large Hungry Green Dragon. And so on.
Childhood, green is the third room and childhood is the third answer.
<span>B maybe the correct answer, only because the last choice has a comma at the end and not a period. (but if you just made a typo while copying and its supposed to be a period, then that's the answer.)</span>