What do I need if my US citizen certificate is lost in post office somehow

You may apply to USCIS for a duplicate certificate of citizenship

You need to obtain an H-4 visa for travel to the US. The EAD is not canceled and your H-4 status and time for the H-4 will be determined by CBP...

Can u change my E2 status into study visa?

Yes it can be changed from E to F but that is often not a good pat, as there is much more flexibility with the E. Your spouse may seek F on her own...

Impact of H1B primary applicant and H4 travel to india for stamping while H4 EAD in process ?

The EAD May be granted only until the expiration date of the H4 prior to departure

Divorce after naturalization does not impact your citizenship. Only a misrepresentation during the process may impact citizenship.

No as traffic citations are not criminal matters. However, if you have any doubts disclosure is fine, they do not impact the decision.

Can I apply for a travel document as a derivative refugee with a green card?

See the form instructions for eligibility. Why not obtain a passport from your country.

I just got married, how does my husband assist me in applying for a work permit?

If your spouse is a US citizen, your spouse may petition for you and you may file for resident status and employment authorization. An immigration...

My wife and kids got their F2 visa rejected, but I got my F1. We applied together. We all had B2 visa. Now what shall we do

It may be possible to visit, if visa remains valid and they are able to convince CBP of non immigrant visitor intent.

Are you able to help with a (8) CFR) section 205.1? (a) (3) (i) (I)?

If the beneficiary married before petitioner became a US citizen the petition is ended. If beneficiary married after petitioner became a US citizen...