CENTRAL NERVOUS SYSTEM INCLUDES THE BRAIN AND SPINAL CORD.
        
             
        
        
        
The products and reactants of each cycle are connected. reactants of photosynthesis (6O2 and C6H12O6) are recycled as products in cellular respiration which produces 6H2O 6CO2 and energy to fuel photosynthesis
        
             
        
        
        
When heavy rain cause dirt and earth to fall rapidly down a clif
        
             
        
        
        
<span>The visceral mass, of gastropods is always contained within the shell; it generally holds the bulk of the digestive, reproductive, excretory, and respiratory systems. A significant part of the visceral hump consists of the mantle, or pallial, cavity.</span>
        
             
        
        
        
 Answer:
1. Thin Humus layer, minerals deep beneath the surface
2.Solar energy
Explanation:
I just took the test and got it right.