Answer:
An opponent is a person who disagrees with something and speaks against it
What is this supposed to be?
I do not see anything.
Complex sentence is formed by adding one or more subordinate (dependent) clauses to the main (independent) clause using conjunctions and/or relative pronouns.
Answer:
She would like to serve the Countess Olivia, who is also mourning for a brother, but learns that she will not accept visitors. Instead Viola disguises herself as a boy and goes to work as a servant to Orsino. Calling herself Cesario, Viola makes a good impression on the Duke who sends her to woo Olivia on his behalf.
Explanation:
I only know one of them, 2 is discovered