False politics & economics have to do with government not the environment but that’s pretty self explanatory
        
             
        
        
        
I believe this would be the cerebellum.  This part of the brain is used for motor control like moving the fingers say and cognitive functions (to do with thinking) and also can affect the feelings of pain and pleasure. 
        
             
        
        
        
The Fossil record is the history of life as documented by fossils, the remains or imprints of the organisms from earlier geological periods preserved in sedimentary rock.
 
        
             
        
        
        
Answer:
they developed some structures or parts to survive
the terrestrial environment