Answer is d because after the big bang the carbon dioxide levels changed dramaticly
Water vapor or moist air rising over a mountain will cool and precipitate as rainfall.
As water vapor, or moist air approaches a mountain, it will rise because the mountains are in the way. The higher you go up a mountain the colder it becomes. Because of the colder temperature up the mountain, the moist air will cool down to reach what is known as its dew point. The moisture in that air then condenses into clouds and eventually, rain. This is why the heaviest rain occurs on the windward slope of a mountain.
This geological process is called Mantle drag .
What is Mantle drag?
According to the first driving mechanism, known as mantle drag, plate motion is the consequence of viscous drag brought on by the lateral motion of the tops of mantle convection cells in the asthenosphere on the base of the lithosphere . Convection cells would thus be mostly absent beneath continents, rising beneath oceanic ridges, and dropping beneath trenches. This idea states that the oceanic lithosphere would be in a state of tension at the ocean ridges and compression at the trenches.
Due to their connection to accretive and destructive plate boundaries, the horizontal widths of the convection cells causing mantle drag would be projected to be around half an ocean's breadth, or 3000 km.
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Explanation:
1- it can quickly mobilize economic resources on a large scale
2-execute massive projects, and create industrial power.
3-It can move so effectively because it overrides individual self-interest and subjugates the welfare of the general population to achieve critical social goals.
