* Faster Evolution: More massive stars have a much higher core temperature and pressure. This leads to faster nuclear fusion rates, consuming their hydrogen fuel at a much quicker pace.
* Shorter Main Sequence Lifetime: While a star of five solar masses burns through its fuel faster, it also has a significantly shorter lifetime on the main sequence. This is because it needs to fuse its fuel more rapidly to maintain hydrostatic equilibrium against its own gravity.
In summary: A more massive star reaches the main sequence faster because of its higher core temperature and pressure, but it also has a much shorter lifespan on the main sequence due to its faster fuel consumption rate.
