Choose the word which is different from the rest.

The answer is B. Bridge.

A brook is a small stream, a bridge is a structure built to span a physical obstacle without closing the way beneath such as a river, stream, or valley, a stream is a body of water flowing in a channel on the surface of the land, and a canal is a man-made waterway.

A bridge is different from the rest because it is not a natural feature. The other three options are all natural features. A brook is a small stream, a stream is a body of water flowing in a channel on the surface of the land, and a canal is a man-made waterway.