An indicator species is an organism whose presence, absence or abundance reflects a specific environmental condition. Indicator species can signal a change in the biological condition of a particular ecosystem, and thus may be used as a proxy to diagnose the health of an ecosystem.
        
             
        
        
        
Answer: kind, fun, warming, funny, weird, never alone 0-0
may i hav branliest so i can reach mah goal pws ^^
 
        
                    
             
        
        
        
All are possible physical changes
        
                    
             
        
        
        
Inspect your home
Be very careful with space heaters.
Check your appliances.
Check the air conditioning and heating unit in your home. 
Check the natural gas/LP gas system in your home.
you did not say any option 
        
             
        
        
        
Answer: 
Self-reference effect
Explanation:
This is a concept which supports the idea of any individual to have a better memory of event he is she is involved with directly than material that have less personal reference.
This is so because it Is natural to encode, store and retain your personal experience.