Final answer:
The Functionalist theory emphasizes the interrelation and functions of social institutions that work together to maintain cohesion and stability in society. Thus (option 3) is right answer.
Step-by-step explanation:
The Functionalist theory focuses primarily on how various parts of society work together to maintain cohesion, order, and the functionality of the whole system. This sociological perspective emphasizes the importance of social institutions such as government, education, family, healthcare, religion, and the economy, which all serve to meet the biological and social needs of the individuals within society.
This viewpoint is closely associated with the works of early theorists such as Herbert Spencer and Emile Durkheim, who compared society to a living organism where each part, like an organ, has a necessary function and contributes to the overall health and stability of the society. Thus (option 3) is right answer.