I agree with you.
I'd also say that a poem using theoretical or obscure terms to convey meaning may be said to be using abstract diction.
Since these terms are not concrete, they are abstract.
Answer:
Ima gonna say Indirect because its not targeted to anyone.
Explanation:
Hope this helps :)
To me it looks like the one you have selected is correct
Older people are less susceptible to conformity because they've most likely been in conformity for a majority of their lives (older generations had less freedom) and they don't want to go through that again.