Which phrase best describes blank verse?

Five accented syllables with no rhyme.

Blank verse is a literary device defined as un-rhyming verse written in iambic pentameter. In poetry and prose, it has a consistent meter with 10 syllables in each line (pentameter); where, unstressed syllables are followed by stressed ones, five of which are stressed but do not rhyme.

A good example would be:

Furball Friend

Sweet pet by day, hunter by night. She sleeps, she eats, she plays. My feet, caught in white paws. She’s up the fence, watching her prey - a bird. Poor thing, better run quick, ’cause watch, she’ll pounce! She’ll sweetly beg for fuss, but don’t be fooled. ’Cause one minute she’ll purr and smile, then snap! She’ll spit and hiss - and oh - surprise! A mouse. He’s dead. A gift. Retracts her claws. Miaow! Figure of eight between my legs, looks upat me and purrs. The sound pulls my heartstrings. Her big blue eyes like dinner plates - so cute. Cunning she is, she knows I can’t resist. Curling up tight, we sleep entwined as one. Despite her quirks, I would not change a claw of her. Cheeky Sammy: my snow-white queen.