Best way to grow hair out?

I highly doubt your hair is like that because it takes a lot to get hair like that and it's never fully natural when it's like that. There's always a product in their that helps it maintain such a look. THe only way you're going to get it like the 3rd one is to flat iron the hair. But if you flat iron it it will damage the ends and you will need more than a1/4 trim. So it's going to take a while. Also, if you keep flat ironing it it could get to that stage but you might not get it back to the way it is now. And the 3rd picture is ugly. You might as well keep the 1st one. it's way prettier and if you want it to sustain it's healthiess...exnay on the 3rd picture.