Final answer:
The correct answer is D, a bridge, as it represents a connection rather than a division between South Gate and the narrator's home, unlike the other options which are barriers.
Step-by-step explanation:
The question you're asking seems to be based on a literary piece where different geographical features divide South Gate from the narrator's home. Considering the details provided from the excerpts, option D, a bridge, is the correct answer as it does not divide but rather connects spaces, making it possible to cross over obstacles such as a river. In the given texts, the bridge is mentioned in contexts suggesting its use as a link rather than a division. The river, a high wall, and a dense forest are all barriers that can divide areas, being consistent with the other options provided (A, B, C).