71 million years ago. Hope it helps :)
The force of gravity increases - when an objects mass increases.
Weight is - caused by gravity affecting mass.
Mass is - the amount of matter in an object.
The force of gravity decreases - when distance increases.
The answer is B.
A. can't be right because the Aborigines were not Indians, because the Indians were the first people in North America.
C. isn't right either only because the Archaic Indians lived in South America .
D. can't be right because Mesoamericans also lived in South America.
<span>The best and most correct answer among the choices provided by the question is the fourth choice "reaching the mantle caused by the movement of two tectonic plates away from each other"</span><span>
The Gakkel Ridge is a mid-oceanic ridge, a divergent tectonic plate boundary between the North American Plate and the Eurasian Plate. It is located in the Arctic Ocean between Greenland and Siberia, and has a length of about 1,800 kilometers.
I hope my answer has come to your help. God bless and have a nice day ahead!
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