Both Radioactive dating of rocks retrieved from the world and Comparing cratering rates on one world to those on another.
Geologists can find the relative age of impact craters on a world because
the ones on top must be younger.
Scientists know the history of Earth's magnetic field because the magnetic field gets frozen into rocks, and plate tectonics spreads them out.
Hope it helps
I’m not sure but try Russia and América hope it helps let me know if I’m wrong:)
The answer is a. corn. Southern colonies have fertile soil for easy to grow crops.
America is an example of a multicultural country or a "melting pot"; some things you'll see in the states are different cultural food for example Taco Bell has Mexican food, Panda Express has Chinese food, and a hotpot place would serve Korean food. You'd also most likely find multilingual people