Channels are cut through mountains and hills primarily through erosion and weathering processes. Natural forces such as water, wind, and ice gradually wear away rock and soil, creating pathways over time. Rivers and streams play a significant role by carving out valleys as they flow, while glaciers can also sculpt the landscape. Human activities, such as construction and mining, can additionally alter terrain and create artificial channels.
mountain tunnelling.
Fiord
That would be called a Fjord.
That would be called a Fjord
The people there cut terraces into the hills and raised animals that could grow on sparse vegetation.
true
The mountains and hills of Greece isolated the city-states which cut off connection with other city-states and countries
Apart from a narrow coastal plain, Albania consists of hills and mountains covered with scrub forest, cut by small east-west rivers.
The Appalachian Mountains cut through the western part of the northeast region of the United States. This mountain range extends from the Canadian province of Newfoundland and Labrador in the north to central Alabama in the southern United States. The Appalachian Mountains are a system of parallel ridges, valleys, and plateaus that are geologically old and eroded compared to the younger Rocky Mountains in the western United States.
Those hills are called the Black Hills.
The opening between mountains iscalled a gap.
they usually cut into the sides of the hills