Immigration: Which option to choose on form I485 Part1 Item 21?

You can type in "parolee" if that will make you feel better.

That language is used when a case is denied.

Be patient. Regularly check your online banking.

Can I leave temporarily after applying for US citizenship?

An LPR is free to travel at anytime. Make sure to return on time.

You are "allowed" to lead normal lives while on an E-2 visa in the USA and that includes conceiving children and giving birth.

I mailed my form i 751 to an incorrect lockbox facility

Don't waste any time - resend to the right mailing address.

I am running out of time for my H1B extension ?as H1B rules are coming into effect on 8th dec, what’s happening with the lawsuit

Results of the litigation will not come in time to "help" you. Need to live with that fact and have employer do what employer has got to do.

About to finalize a pending i130 application. What is the right move?

I agree. DNA taken in the USA will carry more credibility.

Give it 10 days not to grow needlessly impatient.

Is there a chance to convince the U.S. Department of State to recommend a waiver for 2 years Home residency requirement?

No chance whatsoever here based on your facts.