Which was the original urban hearth region whose early settlements diffused to the rest of the world? O the English colonies in North America
O the Fertile Crescent of Southwest Asia
the Roman Empire in Europe
the city-state of Athens in the eastern Mediterranean
O the French colonies in South America

Which factors add to the greenhouse effect and are caused by human activities?

If you could drill a hole straight to the center of the earth, and keep track of what the hole is going through, youwould find: a) you would go through one sort of material, and then a different, denser material, and then a still-different, still-denser material, because the planet is made of concentric layers, sort of like an onion. b) you would go through one sort of material all the way to the center, because the planet is all mixed up. c) if your hole started at the north pole, you would go through different layers of different materials, but ifyour hole started at the equator, you would go through one sort of material all the way to the center. d) if your hole started at the equator, you would go through different layers of different materials, but if yourhole started at the north pole, you would go through one sort of material all the way to the center. e) you would strike diet pepsi when you got to the center.

What distinguishes monsoon asia from the remainder of asia? what are the consequent differences between the two?