Revert Change of Status from H1 to H4

I do not think it is possible. However, you should check with her Immigration attorney.

There should be to this story. You need to consult with an Immigration attorney ASAP.

In which circumstances a Brazilian with mental disability can ask for and gain political asylum in the USA?

If Brazilian is in the US, and cane show that he/she qualifies for an asylum on one of the protected grounds.

Can I travel through Europe to India when visa in progress

If you leave the US before the decision on COS comes, you will need to apply for a visa in your home country.

Filling an asylum in a state (California)and moving to another state after one month (Wisconsin)

Sure, you can do it. Only be aware that your employment authorization clock will stop.

My son 30 is from Pakistan and came to USA on B2 visa and his duration of stay is 1 month. Is it advisable to apply for EOS.

I am afraid that the short admission period came with special instructions by the CBP... Your son should consult with an Immigration attorney here.

If I'm being persecuted by the government. As an American can I seek political asylum in TX since it is an Independent republic?

Asylum is a Federal benefit, and TX is apart of the United States. One cannot get asylum (Immigration asylum of course) from the United States...

Will I be able reopen I 90, application to replace green card?

If the denial is based on potential for deportation, then you need to think twice before doing anything.

Can current employer withdraw my I-140 after 6 months?

You need to consult with an attorney to see if you can change your employers and save your I 140 basis. Currently, an employer may withdraw their...

Can I join company C ?

You risk becoming out of status jumping from employer to employer. I suggest that you speak with your attorney about this.