The $\underline {\text { ultimate } }$ base level is
A) an interior basin.
B) a dam.
C) sea level.
D) all of these

Question

Quizplus · Accepted Answer

The ultimate base level is the lowest point to which a river can erode its channel. This is typically sea level because that is the lowest point on the Earth's surface. However, in certain cases an interior basin or a dam can act as the ultimate base level if they are lower than sea level. Therefore, the ultimate base level can be either sea level or an interior basin or a dam, depending on the local geography. But the most common and ultimate base level is sea level.

The ultimate ‾\underline {\text { ultimate } } ultimate ​ Base Level Is A) an Interior Basin

The $\underline {\text { ultimate } }$ Base Level Is
A) an Interior Basin