stars, the planets have to get heat from stars
No. Blue stars are the hottest stars, far hotter than any planet.
Its colour. White stars are hotter than blue stars which are hotter than yellow which are hotter than orange, which are hotter than red.
Planets orbit stars.
Technically Blue stars are hotter but from your options, white stars are hotter.
No, in fact many planets are hotter than it. the warmest is Venus and then Mercury.
No. None of the planets is hotter than the sun.
Planets do not technically need their respective stars, but stars keep planets in orbit and provide heat and light to the planets.
White Stars
On the contrary! A star has planets, which circulate it. And planets have moons. Stars do not circle planets.
Planets and stars have gravity.
White Dwarves and Blue giants are both hotter than Red giant stars.