Astanza is two rhymed lines four rhymed lines a unit of division within a poem, similar to a paragraph a unit measure of poetry consisting of one stressed and one unstressed syllable

1) Two rhymed lines – No, that would be a couplet
2) Four rhymed lines – No; I'm not sure if there is a specific name for this...
3) A unit of division within a poem, similar to a paragraph – Yes
4) A unit measure of poetry consisting of one stressed and one unstressed syllable – No, this would be an example of a trochee