Final answer:
Without access to the actual topographic map, specific answers regarding contour lines, contour intervals, stream direction, and slope steepness cannot be provided. However, contour intervals represent changes in elevation and stream direction is typically downhill, while the steepness of a slope is indicated by the proximity of contour lines.
Step-by-step explanation:
The elevation marked by the index contour line identified with the number 1 is dependent on the specific map in question, which is not provided. However, once the elevation is known, the contour interval can be determined by looking at the difference in elevation between subsequent contour lines. It is mentioned that the contour interval for Map 1 is 40 meters.
For question 2, the direction of the flow of a stream is determined by the contour lines it crosses. Streams flow from higher elevation to lower elevation, typically from the top of a map (North) to the bottom (South), unless indicated otherwise by the shape of the contour lines. Again, without the specific map, it is not possible to determine the direction of flow accurately.
Regarding the slope indicated by the contour lines labeled with the number 3, a steep slope is indicated by contour lines that are closely spaced, while a gentle slope has wider spaced contour lines. Without the actual topographic map, it is not possible to definitively describe the slope where the number 3 is located.