Answer:
a food web is a a system of interlocking and interdependent food chains, while a food chain is a a hierarchical series of organisms each dependent on the next as a source of food or the series of processes by which food is grown or produced, sold, and eventually consumed.
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Explanation:
 
        
                    
             
        
        
        
C G A U A G C A G G U A U C G G A U A C U C G
        
             
        
        
        
Ants
Earthworms
Rabbits
Armadillo
Badger
Bilby
Burrowing owl
Chipmunks
Olm
Mole
Meetkats
        
             
        
        
        
Answer:
The plant types suitable during that period would be ferns, horsetails, and lycopods. 
Explanation:
A geologic period and system, which covers 60 million years from the termination of the Devonian period to the start of the Permian period is known as the Carboniferous period. During the Carboniferous period, the plant life was luxuriant and extensive, mainly at the time of Pennsylvanian. It comprises ferns and fernlike trees, that is, the giant horsetails known as club mosses, calamites, or lycopods like Sigillaria and Lepidodendron.  
Thus, if humans had been present to construct log structures during the Carboniferous period, then they would have used logs of ferns, horsetails, and lycopods for construction work.