I believe that in developed nations, the nutrients that are most lacking in a child's diet are the; calcium, iron and zinc. Zinc is needed for the activity of more than 100 different enzymes in the body and plays a role in the immune function. It aids in the maintenance of healthy immune function in kids and may reduce the frequency of mild upper respiratory tract infections. Calcium keeps the bones healthy and teeth thus supporting the skeletal structure and function. Iron is an important component of hemoglobin.
        
             
        
        
        
Answer:
A
Explanation:
the beak is long and curved so the A beak would be perfect (give BRAINLEST please)
 
        
                    
             
        
        
        
Answer:
first question:  3. osmosis is a kind of diffusion that involves the movement of water
2nd question:  1. it allows carbon dioxide to move in and out of the cell
Explanation:
 
        
             
        
        
        
Among the following the benefit of using agroforestry in a tropical rain-forest climate is that growing trees provides a boost in crop output for a short time.
Answer: Option A
<u>Explanation:</u>
Agroforestry is a kind of practice in which trees are grown along with the crop which benefits the crop; there is different alley cropping, silvopasture and forest cropping. 
Combining forests and agriculture seem to perform many benefits to the farmer. This type of practice has enabled farmers to show nutrient cycling, crop productivity and change in the micro climate of the place.