I believe the answer is B. Anecdote
Ethos is a mode of persuasion used to convince the audience. It is one of three artistic proofs (ethos, pathos, and logos).
Ethos is also known as ethical appeal and convinces your audience of credibility and character. It is used to prove you are worth listening to. Ethos can be developed by choosing language that is appropriate for the audience and topic (this also means choosing the proper level of vocabulary), making yourself sound fair or unbiased, introducing your expertise, accomplishments or pedigree, and by using correct grammar and syntax.
I'm leaning to all of them, but yoga is good for any age. It doesn't involve going very fast or running, it's very slow and relaxing.
But words is like the spots on dice: no matter how you fumbles 'em there's times when they just won't come. So simile is the answer.
D) It does not rhyme
A blank verse is a verse without rhyme
An example would be:
"If only sunrise lights could converse hope."