Which is the factors of production according to marx is the real generator of value?

According to Marx, the real generator of value among the factors of production is labor. He posits that it is the human effort and creativity applied in the production process that transforms raw materials into goods, creating surplus value. This surplus value, derived from labor, is the foundation of capital accumulation and exploitation in capitalist economies. In Marx's view, while land and capital are essential, it is labor that ultimately drives value creation.