We have shelter and food.
        
             
        
        
        
Photosynthetic organisms capture energy from sunlight with pigments.
 
        
             
        
        
        
Density dependent would be the answer
        
                    
             
        
        
        
Answer:
The effects of weathering disintegrate and alter mineral and rocks near or at the earth's surface. This shapes the earth's surface through such processes as wind and rain erosion or cracks caused by freezing and thawing. Each process has a distinct effect on rocks and minerals.