Answer:
The correct answer is human geography.
Explanation:
Geography is a science that has a very wide spectrum of things that examines and are of its interest. There are over 30 different geographic fields, all of which are very specific, but they all fall into two broad categories. Those two categories are physical geography and human geography.
Human geography is the part of geography that studies the interaction between humans and nature and the characterisitcs of humans. With humans being such a developed and diverse bunch, there is an abundance of things for human geography to study. This ranges anywhere from political systems, econimic development, cultural traits, social structures, to religion, migration patterns, levels of education, age of the population, population distribution, distribution of settlements, etc.
The answer is lithosphere,which is the outermost shell of the Earth, where we're living on and composed of mainly of rocks, and will extend due to the convection movement of magma.
Let's look into the other answers:
Outer core: It is the second deepest layer in Earth, it is not visible for us. It is consisted of molten rock materials with high density. As the temperature is very high (4400-6100°c) the mantle cannot be cooled down to form plate material. Therefore thos answer is incorrect.
Lower mantle: Lower mantle is under the lithosphere and is solid however can flow freely. It is not directly involved in the extension of plate boundaries and is therefore false.
Asthenosphere: It is a layer of molten magma which is indirectly responsible for the plate movement by causing the convection current of magma plate . However this is not exactly where the plate boudaries take place and therefore is not the answer.
How lithosphere is involved in plate boundaries extention: Given the rising convection current of magma, the crust move apart and leave cracks whoch are then filled by magma. As magma cools down,new plates material is cooled down to form new crust. Under ridge push and slab pull, the plate materials is extended.
Hope it helps!
Answer:
(1/2) (height) (sum of the bases) = 1.76 square meters
Explanation:
Sea Levels rise and could possibly sink all continenents