Respuesta :
The correct way to say it is.
These are some of the main reasons plants benefit humans' lives.
These are some of the main reasons plants benefit humans' lives.
It would be your first example.
The 1st example is saying that this affects all humans. The 2nd example is saying it only affects a select few.
I hope this helps :)
The 1st example is saying that this affects all humans. The 2nd example is saying it only affects a select few.
I hope this helps :)