The statement that best describes how the image reinforces the text is the one that reads as follows: "The image aids readers' understanding of key concepts".
Images are far more explanatory and descriptive. They show what the text tries to say in more graphic way, so the reader gets a clear idea. It is said that a picture is worth a thousand words. By putting together both the images and the text, the readers get the whole picture.
Answer: C. The hobbits live together near a great field.
The correct option would be C. Option A assumes that the ropes and poles are there because of a birthday party, but the passage makes no mention of the cause. Option B similarly assumes that Bilbo is the cause of this commotion, which the passage similarly does not state. Option D claims Gaffer Gamgee to be lazy, even though the passage claims he was distracted, and not necessarily lazy. Option C, however, states that the hobbits live together near a field, which is information that is included in the passage.