Is my nephew required to be here in USA in order to apply for H1B? Could he apply from Thailand?

Your nephew's employer can sponsor him from Thailand. Does the employer have an immigration attorney? If not you should encourage him/her to retain...

How can I convince them I love my country. I will return back definitely.

Why did your wife travel to the US close to delivery? The likely worry is not whether you've paid medical bills, but that you planned for your baby...

What are risks .? Can my employer revoke I140 ?Will this put me in trouble? Can you advise?

Sorry but no I-140 portability. The concept doesn't exist because I-140 is an employer's petition, and connected with that employer.

As a green card holder, Can I bring her with K-1 visa?

Unfortunately you'd need to get married first or become a US citizen first.

When is it possible after the filing of I-485 to marry a non US person

I think I understand what you are asking. Since there's no category for married adult sons and daughters of LPRs, you want to know when you can...

The H4 is valid even if stamped with previous employer. However I must caution you on one point. If you extend your H-1b you must also extend H-4....

1) As my current employer is ok with the transfer can i go ahead and do the transfer and how long its going to take.

It's not clear if you're in the US or not. You can't do a transfer as consular processing. Your new employer needs to file a new H-1b. I advise...

Is there no way for me to stay in the country because my mom filed I-485 10 days earlier than the filing date?

I second my colleagues opinion. You and your mom need to seek counsel. Firstly, it was a mistake to file 10 days early, but that doesn't mean you...

I highly recommend an indepth consultation to get clear answers to your questions.

I-765 pending (based on I-485 (c)(9)) and H1b expiring next month. What if I don't get EAD by next month?

If all things are properly filed you can legally remain in the US based on a pending I-485 but you cannot work until you have your Employment...