They are directly related. The more different trees, the more different birds because not all birds like the same trees:
Some like higher trees to build higher nests, others like lower trees, some like the leaves of some trees useful, some live in the trees that give them fruits, other in trees where many insects go, etc.
Hope it helped!
        
                    
             
        
        
        
What graph? Can you send me a pic of the graph because otherwise i cant answer the question.
        
             
        
        
        
Answer:
Why is internal Fertilisation important to animals?
Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. The embryo is isolated within the female, which limits predation on the young.
Explanation:
 
        
             
        
        
        
Answer:
D) the cell appears to be in a rectangular shape and has a cell wall
Explanation:
animal cells don't have cell walls