Concept:
Robert K. Merton explained deviance through his Strain Theory, which describes different ways individuals respond to social pressure and cultural goals.
Step 1:
Merton argued that deviance occurs when there is a gap between societal goals and the means available to achieve them.
Step 2:
His modes of adaptation include conformity, innovation, ritualism, retreatism, and rebellion.
Step 3:
• Rebellion is one of Merton's responses to deviance.
• Retreatism is also included in his analysis.
• Delinquency is associated with deviant behaviour.
Step 4:
Market situation is a concept associated with economic and class analysis, not Merton's theory of deviance.
Step 5:
Therefore, the correct answer is Market situation.
\[
\boxed{\text{(4) Market situation}}
\]