Answer: your answer is A widening
Explanation: pls heart his and rate this 5 starts i took time out of my day to help
Mountain chains and river systems generally run North-South throughout the continent thus making for formidable barriers to East-West expansion.
Answer: Earthquake refers to the sudden shaking of the earth due to the release of energy by the seismic ways in the earth's interior. An earthquake of magnitude 2 is exactly ten times bigger, as well as about 31-33 times stronger than that of magnitude 1 .
Richter scale is used to measure magnitude of an earthquake, that means how much energy has been released due to the release of seismic waves.
Hot spot volcanism is the hot mass of rising heat!