Explanation:
1. A decrease in the number of greenhouse gases that humans produce will result in lowered global temperatures. This will allow the ice sheets in the polar regions to increase increasing also albedo.
2. Using light-colored building materials on houses and pavement in urban centers will work towards increasing albedo as more sunlight is refelcted back by built environments. 
3. Decreased deforestation/increase in aforestation increases the earth’s sirface albedo because vegetation reflects back more sunlight than the earth’s bare surface. 
 
        
             
        
        
        
Answer:
The cilia is one of the things that act defensively in the respiratory system. 
Explanation:
It propels a mucus-like liquid that covers the airway which traps pathogens (potentially infectious microorganisms) and other particles, preventing them from reaching the lungs.
 
        
             
        
        
        
Answer:
D) Solar
Explanation:
Solar can transform light and wind energy to electricity
 
        
             
        
        
        
I think the answer is NUCLEUS.
Hope it helps!