It will be either C or D but I’m some what sure it would be letter c
        
             
        
        
        
When an ecosystem has a scarce nutrient, that is when there is a nutrient limitation. 
So the answer is C. <span>Nitrogen is typically the limiting nutrient in freshwater environments.
This is because Nitrogen is the "scarce" nutrient </span>
        
             
        
        
        
Answer:
The correct answer will be option- D.
Explanation:
The prostate gland is a walnut-shaped gland present between the bladder and penis.
The prostate gland is a part of the reproductive system and not the urinary system as it helps in the nourishment and protection of the sperm cells. It secretes a fluid which contains enzymes like phosphatases, lytic enzymes and antibiotics which helps in the protection and passage of sperm to the egg cell.
Thus, option- D is the correct answer.
 
        
             
        
        
        
The Gallbladder stores bile that is produced in the liver