The answer to the question is c) a dendrochronologist interprets tree rings
        
             
        
        
        
Might just be D must of them don't seem right to me
        
                    
             
        
        
        
The insects clustered around the light is an example of A response to a stimulus. The insects are attracted to the light, so the flocked towards it.
        
                    
             
        
        
        
A biological system is a complex network of biologically relevant entities. ... Examples of biological systems at the macro scale are populations of organisms. On the organ and tissue scale in mammals and other animals, examples include the circulatory system, the respiratory system, and the nervous system. source: google
 
        
                    
             
        
        
        
C.) D<span>iscontinue the use of irrigation systems</span>