Final answer:
The question involves Geography, specifically the interpretation of contour lines and symbols on a topographic map to determine elevation and other geographic features.
Step-by-step explanation:
The subject of this question is topographic mapping, which is a part of Geography. Exploring this question involves understanding elevation, contour intervals, and the features indicated by symbols on a topographic map.
To provide answers for the student's homework, one must first look at the index contour line at point A to determine its value. This involves analyzing the contour lines and their respective elevations that are typically labeled on these lines at regular intervals.
The symbol at point B would be indicative of a specific geographical or manmade feature, such as a mountain peak, a building, or a depression. This symbol helps to identify the type of terrain or structure present at that location.
Elevation data for point B can be obtained by using the contour lines and intervals. The elevation is denoted by the closest contour line and can be estimated based on the interval if the point lies between two contour lines.