Final answer:
Delaware's highest point is Ebright Azimuth at 448 feet above sea level, and it has the lowest mean elevation of any state at approximately 60 feet. The total relief would be calculated by taking the difference between the highest point and the lowest point along a specified cross-section line.
Step-by-step explanation:
Delaware's highest point is Ebright Azimuth, which stands at an elevation of only 448 feet above sea level. As for the lowest mean elevation of any state, Delaware holds this title, with its average elevation being approximately 60 feet above sea level.
Observing the relief of a region involves measuring the difference between its highest and lowest points. Therefore, in your example, if we were to measure along a specific cross-section line, the lowest point (often sea level) would correspond to the coastal areas, where the elevation reaches 0 feet.
The total relief of this line would be the difference between the highest elevation point, which would be Ebright Azimuth, and the lowest elevation point, which could be at sea level on the coast.
In creating a cross-section of Delaware, one would consider both the highest point (Ebright Azimuth) and the lowest point (sea level) to evaluate the total relief. This gives a clear physical representation of Delaware's topography, emphasizing its status as having the lowest average elevation in the United States.