How did romans use rostra to show their power

One stands in front of a Rostrum and one stands upon the Rostra. ... During the late Republic the rostra was used as a place to display the heads of defeated political enemies. Gaius Marius and consul Lucius Cornelius Cinna captured Rome in 87 BC and placed the head of the defeated consul, Gnaeus Octavius, on the Rostra.

Explanation:

Rome that stood during the republican and imperial periods. Speakers would stand on the rostra and face the north side of the comitium towards the senate house and deliver orations to those assembled in between.

beowulf is considered an epic poem because it describes the actions of a great warrior.

beowulf is taken into account an epos. in this poem, the main character may be a hero who travels nice distances to prove his strength at not possible odds against supernatural demons and beasts. in the poem, beowulf was a young warrior and he leaves his country to hrothgar, as hrothgar was in a great trouble.