If a planet becomes too hot then that planet cannot sustain life.
If a planet is too close to a star, then it will be too hot for liquid water to exist.
If a planet is too close to a star, that planet cannot sustain life.
If a planet cannot sustain life, then the planet may be too close to what?
[a] a ship
[b] Sun
[c] sunlight
[d] earth
[e] a crater
[f] an object
[g] a moon
[h] a star