Answer:
it would be C, since an abiotic factor is a non-living thing that helps shape the ecosystem. 
Explanation:
If you look at A it lists flowers, which are alive. If you look at B it lists bacteria, which is alive. C doesn't list anything thats alive. D lists insects, which are alive. 
 
        
                    
             
        
        
        
The answer for this would just be your opinion. 
how confident are you in answering the question, if you are not confident than say you aren’t and try to explain it to the best of your ability.
        
             
        
        
        
I don't know, maybe because of the way we see animals. Not as our equal parts 
        
             
        
        
        
Nucleases are the enzymes that are unique to the pancreas. These are enzymes which break down nucleic acids DNA and RNA into nucleotides. When these nucleotides reach the ileum, they are further degraded or digested into sugars, bases and phosphates. These nucleases are known as DNAase and RNAase
Other pancreatic enzymes such as amylase and protease are also produced by other digestive organs such as the salivary glands and the small intestine respectively. However no other digestive organ has been known to produce nucleases apart from the pancreas.
Nucleases are of two  main types, namely exonucleases which cut off the end of a nucleotide and endonucleases which will cut out certain nucleotide sequences right in the middle of a nucleic acid.