Answer:
the environment and parasites
 
        
                    
             
        
        
        
The outer core of Mars cooled too quickly and the magnetic field didn't have time to fully form so the solar winds destroyed the magnetic field and the atmosphere
        
             
        
        
        
Answer:
example
Explanation:
take 1/8 in wire make 8 rings and connect them
print a picture of the milky way and tape it on the wire
then create small planets paint and label 
hang from ceiling by clear fishing wire
 
        
             
        
        
        
Briefly, one can categorize the 3 types of boundaries as so: At convergent boundaries, the two tectonic plates are coming closer to each other; at divergent boundaries they are increasing they move away from each other and at transform boundaries the plates are moving parallel to their boundary. Based on this, all boundaries will be divergent boundaries.