Answer: A.
Explanation:
Brownian motion is the random motion of a particle as a result of collisions with surrounding gaseous molecules. Diffusiophoresis is the movement of a group of particles induced by a concentration gradient. This movement always flows from areas of high concentration to areas of low concentration.
Example:  The movement of pollen grains on still water. Motion of dust motes in a room (though largely influenced by air currents).
 
        
             
        
        
        
Moles Cu+2 = M * V
                     =  0.05 L * 0.011  m
                     = 0.00055 moles
when the molar ratio of Cu2+: EDTA = 1:1 so moles od EDTa also =0.00055 moles
and when the Molarity of EDTa = 0.0630 M
∴ Volume of EDTA =  moles / Molarity
                 = 0.00055 / 0.0630
                 = 0.0087 L = 8.7 L
        
             
        
        
        

.

Note : Because Many of My Dreams came true and I realized.
 
        
             
        
        
        
Answer:
Answer below
Explanation:
Just draw a photo of someone pushing an object across a table. Your push is the force acting on the object you're pushing.