The phenomenon that  is applicable to the process shown in the figure is : 

                    

1.  Absorption

2.  Adsorption

3.  Coagulation

4.  Emulsification

 
 
HINT: The given phenomenon is an example of adsorption. 
 
Explanation: Above figure represent adsorption of yellowish brown colour of raw sugar by animal charcoal. Here, aqueous solution of raw Sugaris filtered by using animal charcoal. Yellowish brown colour on colour of raw sugar is adsorbed and filterate is coloureless which gives white crystallisation. Hence, this phenomenon is adsorption.