The answer is B, "the government is complicated." In the other examples, the subjects and verbs dont match grammatically. For example, in A, the word "forest" should be plural to use the very "are".
Answer:
contrast
Explanation:
Because first his mood was happy/joyful and went to sad and depressed
I would say anything debatable, if we use a real world topic like the death penalty. you could argue for it to be mandatory or to abolish it. If you want a lighter subject like pineapple on pizza (might not want to use this one if your doing a serious assignment) you could argue it doesn't belong and put the effects. I would find a controversial topic and see if you like it.
Hope this could help!
A because if you take out the "who's" turn it into "who is" then does it sound right
