Answer: Experimental methods
Step-by-step explanation:
Experimental methods is the technique in manipulation and modification in a particular variable is doen to observe the consequences of it on another variable.Random assignment of elements is done in this experiment.
Residential segregation is the division method that is used for separation of the various groups into neighborhood in terms environment of living.
Therefore, experimental method is not suitable to be implemented on residential segregation as it is not an ethical practice to randomly place groups into separated neighborhood.It can also be indicated as impractical practice.