Southeast Asia is the region with Thailand and Indonesia.
Southwest Asia is not a commonly used term, but this would be the Arabian Peninsula and regions around it.
The body of water between them (and south of South Asia= India and north of India) is Indian Ocean, option 3.
An executive order is a legally binding order that is given by the American President to direct federal agencies to carry out some specific action in their execution of Congressionally adopted laws and policies. Whereas a law is a piece of legislation that has been agreed to by Congress.
