Answer: Explosion
I think?
        
                    
             
        
        
        
The dead organisms are recycled back by the activity of decomposing or decomposition. I hope this helps!
        
             
        
        
        
Answer: The second one so uea
 
        
             
        
        
        
Answer:
The signs would be his fever/high temperature. The symptoms would be his feelings of nausea and migraine.
Explanation:
Where a symptom is subjective, as in apparent only to the patient (for example back pain or fatigue), a sign is any objective evidence of a disease that can be observed by others (for example a skin rash or lump).
 
        
             
        
        
        
A Micrometer is one millionth of a meter