Amino acids and fats. Sugars/carbs are used as an energy source, while fats and proteins are used as building blocks during growth. 
        
                    
             
        
        
        
Answer:
Make sure to look for the signs of abuse or neglect.
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Answer:
im going with the word "current" 
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Answer:
 social experiment
Explanation:
According to my research on studies conducted by various sociologists, I can say that based on the information provided within the question the study just described is a social experiment. This type of experiment focuses on research which test a human's reaction to certain situations or events. Which is what is happening in this situation with the students.
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Iodine solution is used to test leaves for the presence of starch. You need to: heat a plant leaf in boiling water for 30 seconds (this stops its chemical reactions) heat it in boiling ethanol for a few minutes (this removes most of its colour)