What are the processes involved in the formation and evolution of stars

What are the processes involved in the formation and evolution of stars, from the gravitational collapse of molecular clouds to the nuclear fusion reactions in stellar cores, and how do factors like stellar mass and composition influence the life cycle and fate of stars?Thermodynamics: Can you delve into the concept of entropy production in irreversible processes, discussing its connection to the second law of thermodynamics and its implications for understanding the arrow of time and the irreversibility of natural processes?