Which of the following are features of blank verse?

a poem written in unrhymed iambic pentameter
a poem in 14 lines with a strict rhyme pattern
a poem without rhyme or regular meter
a poem intended to be sung rather than spoken

" A poem written in unrhymed iambic pentameter " is the option that constitutes a feature of a blank verse.

A blank verse refers to a type of verse which lack rhyme. It is usually written in iambic pentameter. Shakespeare was the writer who used to write in blank verse.

Blank verse is poetry written with regular metrical but unrhymed lines, almost always in iambic pentameter. It has been described as "probably the most common and influential form that English poetry has taken since the 16th century."

the answer is:

apprehensive.

which of the following was specifically permitted by the emancipation proclamation?

free african americans were allowed to fight for the confederacy.

free african americans were allowed to enlist in the union army and navy.

enslaved people in border states were allowed to move to the north.

enslaved people in border states were allowed to become confederate citizens.