No one knows how many things it needed the earth to be alive.
I read an article about only one thing who contribute in many ways to be the most beautiful planet of our solar sistem.
It is really important for us how the Sun works? Yes, because without the radiance of the sun earth's trillions of living things including us would not be here. Imagine gone would be the variety of the life distributed among the millions of species, ranging from single-celled bacteria to immense whales.
The true is that only about half  a billionth of the sun's energy output reaches our planet. Yet even those few crumbs from the solar table are enough to nourish and sustain life on the earth.
But not only that! If tiny trick le that arrives could be harnessed efficiently, it could easily meet the energy needs of our moder society, with power to spare.

Definitely the Sun is perfect
"Powerhouse". It is stable, it is the ideal size, and emits just the right amount of energy. For good reason it has been called a "Very special star". Certainly God gave one of the most greatest gift to all of us.