Answer:
Here are the options to complete the question
A. Fenestrated capillaries
B. continuous capillaries
C. sinusoids
D. anastomoses
A. Fenestrated capillaries is our Sure ANSWER
Explanation:
Fenestrated capillaries (is located wherever active capillary absorption or filtration occurs)
The renal glomerulus - a network of capillaries - can be identified as fenestrated capillaries aiding the diffusion of small molecules and small amount of protein into the blood stream. 
 
        
             
        
        
        
Birds, just like humans, have a four-chambered heart.
        
                    
             
        
        
        
Answer:
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.
 
        
             
        
        
        
I believe your answer is B. Taxonomy
 
        
             
        
        
        
discord cells I am not sure but I think it is correct