Please help with my operating systems homework for CS. Will give thumbs up

The primary difference between two processes created by a parent process and two threads created by a parent process is: Processes share data while threads do not Processes do not share data while threads do No difference Processes share code while threads do not Question 5 1 pts Which of the following is direct communication? Posting to a bulletin board Sending email to a group alias Sending email to a specific individual at a specific address Sending email to a mailbox