<span>Do u need the answer out of these four question?
primary consumers        (
secondary
tertiary
,,
producers
decomposers)</span>
        
             
        
        
        
I would say endurance.Sorry if wrong
        
                    
             
        
        
        
As people are always dying and babies are always being born so doctors don’t know the exact figure of the population, just an estimate.
hope this helps x