Structuralism, which was founded by Wundt
        
             
        
        
        
The author uses a historical text. It is a written document that allows obtain a more completed, diversified and meaningful knowledge of history. A historical text is a written document that can provide us, after its interpretation, knowledge about the human past. The object of commenting on a historical text is to approach the understanding of a historical epoch based on the elements provided by the text. Hence the importance of placing the document in its context. It is necessary to unravel what its author or authors have said, how they have said it, when, why and where, always relating it to its historical moment. They are based on reality, generally their structure is narrative and descriptive; usually they are written chronologically and reflect experiences. 
 
        
                    
             
        
        
        
Answer: cryosphere and geosphere
Explanation:
cryosphere are the glaciers in the world, and geosphere is in the earth's crust, which is how lava comes up. this means that the first option is correct.
 
        
                    
             
        
        
        
The correct answer to this open question is the following.
Moscow is the capital city of Russia. It is very populated. Indeed it is the biggest city in Europe with more than 10,5 million citizens living there. 
The last Russian census of 2010 provides information that says that Moscow and the metropolitan adjacent areas total 17  million people. Since the dissolution of the Soviet Union, Moscow has constantly grown year after year.  
Moscow is the most important city in Russia, attracting tourists and businessmen from all over the world. It is a multicultural city that combines, culture, tradition, history, and modernity. A must-visiting place.