I would say body language because animals can detect threats
        
                    
             
        
        
        
Cancer: An abnormal growth of cells which tend to proliferate in an uncontrolled way and, in some cases, to metastasize (spread). Cancer is not one disease. It is a group of more than 100 different and distinctive diseases. Cancer can involve any tissue of the body and have many different forms in each body area.
im pretty  sure   it is the first one
 
        
                    
             
        
        
        
I think it’s erosion... not sure what you’re asking
        
             
        
        
        
<span>All of their skulls were fairly long with sharp teeth.</span>