Answer:
b. crystallization above ground and crystallization below ground
Explanation:
The magma undergoes transition when it moves from the mantle layer toward the lithosphere. The reason for this is that the pressure and temperature drastically change. With other words, the magma starts to cool off as it comes toward the surface of the Earth. As the magma cools off it starts to crystallize, resulting in the formation of igneous rocks. When the magma comes out on the surface, known as lava in those cases, it cools of very quickly because the temperature and pressure are much lower. Because the cooling off occurs very quickly, the magma crystallizes quickly, so the crystals are small, and it forms extrusive igneous rocks. When the magma cools off underground, but still relatively close to the surface, the temperature and pressure are slightly bigger than those on the surface. Because of this, the magma cools off slower, thus it crystallizes slower. This results in the formation of larger crystals, and intrusive igneous rocks.
Answer:
Digging of irrigation canals to irrigate their fields allowed for growing better and more crops. food surpluses allowed people to do other work than farm. this meant that they had enough food to survive in extra to trade with.
Explanation:
Hope this helped Mark BRAINLEST!!!!
Answer:
I dont know yet give me a sec
Answer:
Labor unions give workers the power to negotiate for more favorable working conditions and other benefits through collective bargaining. Union members earn better wages and benefits than workers who aren't union members. On average, union workers' wages are 28 percent higher than their nonunion counterparts.
