Which diet is the best?
There is no one perfect diet plan or anything else for that matter.
It depends on your lifestyle, where you live, how old you are, how active you, your DNA, are,etc,etc.
Your diet will change as you age and as your lifestyle changes.
So if your 10 then you diet will be different from when your 20.
If you work in an office then your diet will change if you become a lumberjack.
If you live in a hot country then your diet will change if you move to a cold country.
If your hobby is chess, then your diet will change when you take up a new hobby like mountain climbing.