For the answer to the question above, 
the development of specialized tissues and organs in a multicellular organism's embryo occurs as a result of "<u><em>differentiation</em></u>"
It is the <span>process where a cell changes from one cell type to another.</span>
        
             
        
        
        
The digestive and respiratory tracts include the pharynx. The pharynx is found at the back part of the throat and is connected to the mouth and the nasal cavity. It then extends to connect into the esophagus and larynx. The pharynx serves as passageway for air during respiration and food for digestion.
        
                    
             
        
        
        
I think it’s c bc it say one way to make the earths coal supply last longer and you can build and use solar power plants
        
                    
             
        
        
        
Explanation:
Agricultural productivity is dependent on Co2, Temperature, Solar Radiation, Precipitation, Soil Moisture and Wind Direction. Changes in any or all of these elements has a direct impact on the crop production
 
        
             
        
        
        
Answer:
carbon monoxide , nitrogen oxide water vapour ozen gases etc