If a land surface where a mountain once stood is now a low,flat plain,__________ have been at work.
A)tectonic forces
B)volcanoes
C)gradational processes
D)earthquakes

Question

Quizplus · Accepted Answer

Gradational processes (such as erosion and weathering) are the main factors that can gradually wear down a mountain and turn it into a low, flat plain over a long period of time. Tectonic forces and earthquakes can also contribute to the process, but they are not the primary cause of the mountain's transformation. Volcanoes, on the other hand, can actually create mountains, so they wouldn't be responsible for turning one into a plain.

If a Land Surface Where a Mountain Once Stood Is