The Earth gets its heat from the sun.
Production points inside the curve show that an economy is not producing at its comparative advantage
Not fully sure i heard there was only 26 pyramids by my teacher but she wasn't fully sure.
Answer:
The Great Plains undergo changes from one year to another. These changes are determined by the production of floods, the accumulation of sediments or changes made by man (dams, construction of dams, gravel pits).
The Rocky Mountains shrunk annually. External factors (water, air, wind, freeze-thaw process) cause changes in the structure of the rocks and so there are changes in the mountain landscape.