What part does color usually play in preschool children’s artwork?

What is the meaning of the word checking as it is used in this sentence from the second paragraph of the passage?

Read the excerpt from "the love song of j. alfred prufrock." and indeed there will be time to wonder, “do i dare? ” and, “do i dare? ” time to turn back and descend the stair, with a bald spot in the middle of my hair— [they will say: “how his hair is growing thin! ”] my morning coat, my collar mounting firmly to the chin, my necktie rich and modest, but asserted by a simple pin— [they will say: “but how his arms and legs are thin! ”] do i dare disturb the universe? in a minute there is time for decisions and revisions which a minute will reverse. which lines indicate that the speaker is concerned about what others think of him?

Doug plans to end his adventure story by introducing a new character during the climax. the new character happens to be an experienced guide who will lead the protagonist down a treacherous mountain and into safety. explain the problem with his plan.