Answer:
Glacier Landforms: Trough. Glacial troughs, or glaciated valleys, are long, U-shaped valleys that were carved out by glaciers that have since receded or disappeared. Troughs tend to have flat valley floors and steep, straight sides. Fjords, such as those in Norway, are coastal troughs carved out by glaciers.
Or: Steep U shaped valleys that connect with the sea and fill with water when the glaciers melt. Now keep scrolling;)
Explanation:
The mantle is actually a liquid. The intense heat of the core of the Earth causes the mantle to move in convection currents.
<span>the answer is pan-</span>Africanism
C. Pennsylvania because it is close to newyork and can have similar cultures