Which stanza structure does emily dickinson use in this excerpt from “hope is the thing with feathers”?

hope is the thing with feathers
that perches in the soul,
and sings the tune without the words,
and never stops at all,

and sweetest in the gale is heard;
and sore must be the storm
that could abash the little bird
that kept so many warm

a. couplet
b. quatrain
c. sestet
d. octave

Highlight all instances of parallel structure. there is no longer any room for hope. if we wish to be free—if we mean to preserve inviolate those inestimable privileges for which we have been so long contending—if we mean not basely to abandon the noble struggle in which we have been so long engaged, and which we have pledged ourselves never to abandon until the glorious object of our contest shall be obtained—we must fight!