Hello Pgoodrichstat!
The process that helps gas exchange occur is called diffusion.
Cheers!
-Blizzard
        
                    
             
        
        
        
Answer:
Option d. an incense stick 
Explanation:
because it produces smoke and it's smell attracts others.
 
        
                    
             
        
        
        
Cytoplasm maintains the internal pressure in the cell. 
        
             
        
        
        
Natural regeneration of forests and woodlands is the process by which new trees grow from seeds that have fallen and germinate where they have fallen.  The biggest problem with natural regeneration is that is unpredictable.  As a result, it cannot be used for commercial farming. For most of the last two or three hundred years, forests and woodlands have restocked by using transplants grown in nurseries. The young trees are planted in equidistant rows. This allows each tree the best possible change of optimal growth. 
        
             
        
        
        
Ice caps form because high-latitude regions receive less energy in the form of solar radiation from the Sun than equatorial regions, resulting in lower surface temperatures.
# eazy