Answer:
Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. The history of agriculture began thousands of years ago. ... Pigs, sheep and cattle were domesticated over 10,000 years ago.
Explanation:
Answer:
From UV rays from the sun
Explanation:
Because UV rays are dangerous
Answer:
Mid-oceanic ridges are formed during the process of seafloor spreading. This creates new oceanic crust.
The speed and violence of the tectonic processes are different.
Divergence is slower and somewhat gentler, and there is less restricting pressure to oppose the upwelling magma (Water may be heavy, but it IS fluid.) The fluidity and cold temperature of the ocean absorb and dissipate the violence of forcing magma out of the mantle and the encounter between great heat and cold waters.
Convergence may combine tectonic movement from multiple vectors, different types of plates may force an oceanic plate under a continental plate and the collision speed will determine the subduction angle and depth. The ejection of material from great depth, through an overriding solid plate, requires great force and pressure. Where hot material encounters underground waters, resultant steam may be superheated and compressed.
Note, however, that volcanic eruptions resulting from deep underwater hot spots may be the most violent of all such events, belying the question’s premise.
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<em>Anoxia, or a lack of oxygen in bodies of water leads to</em> dead zones.
