Why should the mass of the planet, on which life can arise, not be more than 1/20 of the mass of the Sun?

If the mass of a planet is more than 1/20 of the mass of the Sun, intense nuclear reactions begin on it, which increases its temperature, and it begins to glow with its own light.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.