Concept:
Max Weber explained bureaucracy as a rational and efficient organizational structure.
Step 1:
Bureaucracy is based on formal organization, clear authority, and fixed procedures.
Step 2:
Hierarchy, specialization, and formal rules are key features of Weberian bureaucracy.
\[
\text{Hierarchy, specialization, and rules are correct characteristics}
\]
Step 3:
Socialization refers to learning social norms and values, not a bureaucratic feature.
Step 4:
Bureaucracy focuses on administration and organization, whereas socialization concerns social learning.
Step 5:
Therefore, the correct answer is Socialization.
\[
\boxed{\text{(4) Socialization}}
\]