Answer:In old stems the epidermal layer, cortex, and primary phloem become separated from the inner tissues by thicker formations of cork. Due to the thickening cork layer these cells die because they do not receive water and nutrients. This dead layer is the rough corky bark that forms around tree trunks and other stems.
Explanation: wikipedia.
 
        
             
        
        
        
Riparian foliage <span>provides shade and shelter. The correct option among all the options that are given in the question is the first option or option "a". Riparian foliage are generally considered as natural biofilters. It protects the aquatic environment and also helps stopping excessive sedimentation. I hope the answer has helped you.</span>
        
                    
             
        
        
        
Just took the quiz the answer is
b. food abundance
        
                    
             
        
        
        
Total number of oxygen atoms in carbon dioxide and water
 
        
                    
             
        
        
        
I would go to technology resource first because technology is everywhere in your home, libraries, etc. You can find out what bees do in trees by researching your answer on a search engine and going on trusted websites.