Antonyms: match the following word with the word or phrase most nearly its opposite.

dissident

a.
a follower

b.
a provider

c.
a protester

d.
a contender

The antonym of this word is A. a follower.
When you say dissident meaning a person who loves to oppose everytime. 
A provider, a protester and a contender are all synonyms of this word. A follower thus is the antonym of it because a follower never opposes. It always follows.

is basically a good source of getting and others by what you know for example if someone asked a question and you know the answer you could answer it and get some points or if you need on a question you could make a post about it and wait till someone answers it or just look up the question and see if someone else has asked about it