These lines (there is four of them) are residuals of the fusion of the five sacrum vertebrae that are fused. These "vertebrae" or segments present a characteristics, being the first of them very similar to a lumbar vertebra, large, and the other vertebrae are<span> progressively smaller and flattened. They also present a curved shape being anteriorly concave.</span>
        
             
        
        
        
They show which parts of the brain are involved in specific activities
        
             
        
        
        
Biological evolution is the process through which the characteristics of organisms change over successive generations, by means of genetic variation and natural selection. hope that helps
        
                    
             
        
        
        
Yes the digestie system is red
        
                    
             
        
        
        
Answer:
A,C,D are the correct answers
Explanation: