-Melting Icebergs, glaciers, and ice sheets
-sea level rise
-wildfire
        
             
        
        
        
I believe it should match as the following...
sight in whales -----> eyeballs in cavefish
balance in monkeys -----> tailbone in humans
attachment point for limbs in frogs -----> pelvis bone in whales
        
                    
             
        
        
        
Efferent nerve any nerve that carries impulses from the central nervous system toward the periphery, such as a motor nerve
        
             
        
        
        
Answer:
They are in a fixed ratio
Explanation: