Pretty sure it's called a Pen Name, search it up. Because if you create yourself a pen name, you are giving yourself a fake name to publish things with. An example is Erin Hunter, who published the Warrior Cats series. Erin Hunter is actually six cat lovers in all truth.
disadvantages is the right answer here
Even though life is a struggle you must keep going
Words Incorrect:
Arbitrarry- Arbitrary
Desstitute- Destitute