For slow breathing a place and time you could use it would be when you are meditating and trying to calm yourself when you are overwhelmed, when you wake up in the morning and look at yourself in the mirror you can point out all of the positive things about yourself that you love.
They are definitely not synonyms, that would mean they mean the same thing wich they definitely do not. They are antonyms.
Still trying to get you to understand the story
In iambic pentameter, each verse consists of five metrical feet. Meter is a poem's rhythm, and feet are units of that rhythm.
In an iamb, an unstressed syllable is followed by a stressed syllable, as in the word "hello."
"Penta" means five, so a verse of iambic pentameter has five iambs.
Five pairs of unstressed syllables followed by stressed syllables.
Five pairs gives a total of ten syllables. So the answer is B, "each line contains ten syllables."
