Karl Marx explained the process of class struggle with the help of which one of the following theories?

Karl Marx explained the process of class struggle with the help of Dialectical Materialism. Dialectical materialism is a strand of Marxism synthesising Hegel\'s dialectics and Ludwig Andreas Feuerbach\'s materialism. According to certain followers of Karl Marx, it is the philosophical basis of Marxism, although this remains a controversial assertion due to the disputed status of science and naturalism in Marx\'s thought. The basic idea of dialectical materialism is that every economic order grows to a state of maximum efficiency, while at the same time developing internal contradictions or weaknesses that contribute to its decay.