C) Eutrophication is the answer
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The answer should be B Convection
        
             
        
        
        
There are choices for this question namely:
<span>right primary
right secondary
left secondary
left primary
</span>
The correct answer is "right primary" or the right main bronchus. Anatomically, the right main bronchus has a larger diameter and a steeper angle (to compensate for the location of the liver). When a foreign body is accidentally aspirated, most commonly, it will lodge on the right main bronchus; especially in children.
        
             
        
        
        
Answer:  fat
Explanation:
Carbohydrates, fats and proteins are among the major nutrients in the food component.
- Where proteins helps in growth of the body where as carbohydrates and fat provide energy. Protein has 4 calories per gram. 
- Carbohydrates are instant form of energy. All carbohydrates turn into glucose and raise our blood sugar. Carbohydrate has 4 calories per gram.
- While fats are the slowest source of energy but provides most energy. Each gram of fat provides about 9 calories [ approximately more than twice that in proteins or carbohydrates].
Hence, fat gives you the most energy .
 
        
             
        
        
        
Gem amethyst turns purple because of the irradiation with iron. Answer is Iron.