There is a yes/no question in n400 application part3 which reads: Are either of your parents U.S. citizens?

Per avvo's own guidelines, the purpose of this forum is to ask for general guidance rather than obtain help with specific form questions. Therefore...

If a person's dad is a naturalized citizen, does that make his children citizens if the children were born in Mexico?

Impossible to answer without a legal consultation.

What happens when you change employers with an approved I-140?

You're asking for a legal analysis rather than simple guidance. For that it is impertinent that you seek the advice of a reputable immigration...

Can I help my husband get a green card?

Assuming he entered without permission, you will need to see if a waiver would work in his/your situation. If so, you can petition and try to...

It's time for you to immediately hire an immigration attorney to look over the discrepancies made and advise you on how to cure them, if possible,...

H-4 visa and I-94 expired?

Yes but she needs to extend her status. Work with an immigration lawyer.

Can I wait on sending financial and supporting documents ?

You will need to contact the NVC within a year or your visa will risk termination. Nowadays they are sending e-mails with warnings that cases will...

No, that is not authorized without an employment authorization.

what i have to do? I sent my I 589 application without a Return Receipt postcard

Time to hire an immigration attorney and not file yourself

I need to know how I can apply for a U.S Birth Certificate, and SSN successfully, without any previous evidence of citizenship.

Baptismal records and sworn affidavits of birth in the US may be a start. You really should have an immigration lawyer handle this.