Your answer is B, cell wall.
        
                    
             
        
        
        
The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord.
        
             
        
        
        
<u>Deposition</u> is the process of sediment being placed in a new location.
When sediment is carried away, this process is called <u>Erosion</u>.
<u>Explanation:</u>
Deposition is the process in which the sediments are placed in a new location. Sediments are the tiny particles formed by the rocks or dead plants and animals.
If these sediments are present on the top layer of the earth and is loose then they are carried away to a new location by air and water.
Soil erosion also removes the nutrients from the area and makes it infertile.  Deforestation is one of the major causes of soil erosion.
Wind, water, and gravity transport earth materials (silt) in a procedure called erosion. In the end, each residue is set down in a procedure called Erosion.
 
        
                    
             
        
        
        
Answer:
Concentration gradient
Explanation:
The larger the difference in concentration of the molecules between the two locations, the higher the concentration gradient. The system is therefore referred to as having a high Free Gibbs Energy (and  low entropy), which is the potential energy intrinsic of the system to do work.  Therefore, it will be spontaneous that the molecules will want to move from the location of higher concentration to the location of lower concentration until equilibrium is achieved (process called difussion).