The correct answer is option 4: Individual Freedom. This means that individual freedom is not a central tenet of socialism.

Option 1: Historical Materialism is a central tenet of socialism. It is the theory that the historical development of society is based on the material conditions of production and the class struggle.

Option 2: Dialectical Materialism is also a central tenet of socialism. It is a way of understanding the world through a dialectical process, where contradictions and conflicts drive change and progress.

Option 3: Alienation and Class Struggle are essential concepts in socialism. Socialists argue that under capitalism, workers are alienated from the products of their labor and are exploited by the capitalist class. Class struggle refers to the ongoing conflict between the working class and the capitalist class.

Therefore, option 4 is the correct answer because individual freedom is not considered a central tenet of socialism. Instead, socialism focuses on collective equality, workers` rights, and the redistribution of wealth.