Answer:
Frogs have smooth or slimy skin that is moist, whereas toads have thicker, bumpy skin that is usually dry. All toads are poisonous, while frogs are not. 
 
        
                    
             
        
        
        
I think its called glacier. Hope I helped 
        
             
        
        
        
Answer:
Secondary succession has happened.
Explanation:
secondary succession is the ecological succession that occurs after the initial succession has been disrupted and some plants and animals still exist. It is usually faster than primary succession
 
        
             
        
        
        
Human,increase population and Overharvesting
 
        
             
        
        
        
Answer:
D: decomposers return carbon dioxide to the air
Explanation: