Intermediate-mass stars are a class of stars that have masses between 1.5 and 8 times the mass of our Sun. These stars undergo nuclear fusion in their cores, converting hydrogen into helium and releasing energy in the form of light and heat. They typically have lifetimes of several billion years, during which they go through different stages of evolution, including the main sequence phase where they burn hydrogen, the red giant phase where they expand and cool, and ultimately the planetary nebula phase where they shed their outer layers and form planetary nebulae. Intermediate-mass stars play a crucial role in the chemical enrichment of the universe, as they produce heavier elements through nuclear fusion and distribute them back into interstellar space through stellar winds and supernova explosions. Studying intermediate-mass stars can provide valuable insights into the evolution of stars and galaxies, as well as the formation of elements essential for life.