Belle

1. Your EAD is valid for as long as there is no decision on I-485. 2. It's possible that I-485 will get denied because your petition (I-485) was filed when your [effective now] PD was not current when I-485 was filed. 3. You sure can.

When I-485 is pending you can stay in the US legally. I-485 itself, however, provides no status. EAD gives you the right to work. There is no obligation to work. EAD (used or unused) does not provide status. Once you no longer work for an H1 employer, you are out of H1 status. Unless you get another H1 approved with a I-94 at the bottom, you will have no status. You will be legally present based on the pending I-485. It is not clear what category your I-485 was filed in, but you need to make sure you maintain elibility for your green card especially, if you no longer have status.

If the I-140 is revoked for a cause, then two bad things happen 1) you no longer can use AC21 for I-140 portability and 2) you lose the PD to be used in any subsequent I-140s. You need to get the NOIR and address it.

No, the I-485 will not get denied (and certainly not rejected) if the principal dies. The minor must have a SSN to apply for SS benefits. Not sure you even read what I wrote.

For loss of breadwinner SS payments, the minor does not need to be PR, but needs to have a SSN. The eligibility is based on payments into the SS by the parent. Some things cannot be accomlished with the IRS if one only has TaxID for minors. I believe, tax rebates was one of them. These situations are not common, but it really sucks when a widow and two children cannot get SS payment after death of her husband despite being on PR track and having TaxIDs for the only reason of being on H4 and not having SS numbers.

The child may get a SSN. That may be beneficial in many ways, from tax filing to social security payments in case you die (I know it's not in your plans, but sh1t happens).

You must have some sort of work authorization - approved H1, pending H1, or EAD. Otherwise, the employment is unauthorized.

You really need to talk to a lawyer to understand your options. As far as I know, traffic violations that do not result in arrests don't count for job applications, immigration, etc.