Name the three main rivers of North America ???

pls help me

South america is located within which hemisphere?

Which component of a milankovitch cycle is related to periodic ice ages throughout earth’s history?

Will give brainliest asaapppppppppppp plz im in a major hurry to finish which of these pairs of objects exerts the greatest gravitational force on each other? object 1 and object 3 object 4 and object 3 object 1 and object 4 object 4 and object 2