Why are some children very stubborn?

Human nature.  Why are some adults?

hmmmm.............but a adults charactor is built from personal
experiance,enviroment..................but a child has just come into
the world

alot of people get more stubborn with age, because they think they
know it all, etc etc

there must be a reason, with alot of adults you can see how they
evolved too become stubborn, but with a child ??

You said:

"..but a adults charactor is built from personal experiance,
enviroment but a child has just come into the world"

Children do not come into the world as blank slates. This we know.
They come equipped with a large part of their personality tendencies.
Preferences for compliance, independence, extroversion or
introversion, and many other behavioral traits are present in infants
from birth.

The term "stubborn" is a term applied to other people when they do not
do as we wish. A better term is independent. See the child through
these eyes, and you'll be encouraged by his/her behavior, rather than
frustrated or angered by it.

Best of luck --

-K~

I agree very much with knowledge_seeker's comment. Along with her
great counsel on perspective, I want to add one more thought. Children
saying "no" and being strong willed aren't being "bad." This is one of
the ways children learn--they can express their own opinions! And they
have choices! They're learning that they have power and that's good!
When children recognize that they have a choice and act on it, that
shows a great deal of development and intelligence. Be grateful.

Also, a little tip that works wonders is giving choices. Don't ask
questions (or give commands) that can be answered with a "no."

Instead of "Would you like to eat?"--try "Do you want green beans or corn?"

Instead of "Don't jump on the bed!"--try, "You can sit on the bed or
jump on the floor--which would you like?"

Giving children a little bit of control over their environments like
this is both very empowering for them and very helpful to parents. I
highly recommend this. It seems so simple and it is. And it works!

Good luck!

Sincerely,
Boquinha-ga

thankyou all for your coments