Which geographical feature defines both the Dead Sea and Mount Everest?

The correct answer is linked to the unique geographical characteristics of the Dead Sea and Mount Everest. The Dead Sea is famously known as the lowest point on Earth's surface that is not covered by water, located at approximately 430 meters below sea level. On the other hand, Mount Everest holds the title of the highest point on Earth, standing at 8,848 meters above sea level. While both are extreme geographical features, the connection between the two lies in the idea of elevation; both represent the extremes of measurement in an upward and downward direction.

The other options do not accurately encompass the defining feature that connects both landmarks. The highest point only applies to Mount Everest but does not concern the Dead Sea. Water source is not relevant, as neither location is primarily defined by its role as a water source for surrounding regions. Terrain type does not capture the defining aspect of elevation, as both locations have markedly different terrains—a lake and a mountain. Therefore, recognizing the density of elevation in relation to sea level is key to understanding the significance of the lowest point.