What is the standard map symbol difference between a building and a stream?

• A. Buildings are shown as black outlines or blocks; streams are blue lines with line styles.
• B. Streams are blue lines; buildings appear as red blocks.
• C. Buildings are green outlines; streams are green dashed lines.
• D. Buildings and streams are both black; no color difference.

Answer: (A)

The main idea is that map symbols use color and shape to distinguish feature types. Streams are shown as blue lines, often with different line styles to indicate things like width or flow. Buildings, on the other hand, are depicted as black outlines or solid blocks, reflecting man-made structures. This difference in color and form helps you quickly tell water features from built environments at a glance. The other options mix up colors or representations (for example, using red or green for buildings, or showing both features in black), which would blur the distinction between these features on a map. So the best match is buildings as black outlines or blocks, and streams as blue lines with line styles.