This question is incomplete because the options are missing; here is the complete question:
The six __________ of geography include “places and regions” and “human systems.”
A.  key areas
B.
essential elements
C.  environments
D.  spatial terms
The correct answer to this question is B. essential elements
Explanation:
Geography is a science that focuses on analyzing the forms of land, the features on Earth, and the interaction of human societies with these. All of this knowledge is divided into six essential elements that include places and regions, human systems, spatiality, uses of geography, among others. In the case of "places and regions," this focuses on understanding the division of land based on social construction and also, land features. On the other hand, human systems focuses on the interaction of human societies with geography. 
 
        
             
        
        
        
It prevented slaves from learning how to read and write. It also made it scary for them to escape because they allowed slave owners to whip them or hang them for trying to escape or committing small or big crimes.
        
             
        
        
        
Answer:
With the Discovery of trench warfare, There was a need for weapons that were capable of long-range destruction and also inflict maximum damage at the same time. this resulted in the invention of many new weapons.
 
        
             
        
        
        
The answer that best applies to both the Tang and Song dynasties would be C. A Reliable food production and distribution system. This gave both dynasties the ability to thrive.
        
                    
             
        
        
        
Answer:
Germany escalated its U-boat attacks in 1917 because of Germany's military buildup, the British blockade, and the use of submarine warfare. As war continued on land, Britain decided to use the tactic of the sea and their naval strength. Any ships that were found in the waters around Britain would be sunk.
Explanation:
SORRY IT"S THE SAME ANSWER