Answer:
were introduced into American geography in the 1920s by Carl Sauer
the type of lava that is erupted and it's Viscosity
The thing responsible for the plate motion is plate tectonics.
Explanation:
Well maybe because like cows do, some adventure off by themselves, and with younger cows they may forget where to head back. And if you think about it that leads to older cows which leads to new cow groups in different areas. Just like dinosaurs may have done.. Just a maybe
