i think its D but i'm not 100% sure
 
        
             
        
        
        
Answer: Erosion and deposition
Explanation: As the water ran through and against the river banks and land, it slowly begins to erode. Also, as deposition occurs (Deposition-When a river deposits the silt and other things in it out into the ocean or where ever it empties.) it creates a delta.
 
        
                    
             
        
        
        
Answer:
chemical change.
Explanation:
There are two types of changes in matter: physical change and chemical change.
physical change- it is a change in matter that alters only its physical properties or its physical appearance. This type of change is reversible. For example- freezing of water, the water turns into solid ice and it can be reversed by melting the ice.
chemical change- it is a change in matter that alter its chemical and thus its physical properties. Most chemical changes are irreversible. for example- burning of paper, results in black soot and ashes- Thus changing both physical and chemical properties.
 
        
             
        
        
        
The mitotic spindle forms during pro-phase, and the centrosomes move to the opposite ends of the cell. The mitotic spindle has micro tubules that capture the chromosomes. While this process begins in prophase it continues over into metaphase.