Support for/or public support for or recommendation of a particular cause or policy (advocacy) of improvement of a community/society. A key idea or feature that makes up progressivism is the reform of taxes, military, or laws.
The difference between free verse and black verse is free verse has no rhythm. Free verse flows naturally, I guess you can say. It doesn't rhyme. It's kinda like as song. Most songs don't rhyme unless it's rap. So, songs are categorized as free verse while rap is categorized as, well, a rhyme that rhymes.
Honestly, all of them can. I would select them all. Context is the only one that’s iffy, but context is also important because words can have connotative meanings that alter their meaning and tone.