Question

The Odyssey - Elpenor is an epic poem because it features a(n)

character summoning and talking to the dead.
character sacrificing animals on a remote island.
invocation to an ancient Greek goddess.
important event in ancient Greek history.

Answer 1

character summoning and talking to the dead.

In Book 11 Odysseus summons the shades in the Underworld and speaks with Elpenor (and other dead), a common epic trait (journey to the dead, contact with spirits).