It would be was and was because he is singular. I'm not sure about complete or completes, but I think it would be complete.
Answer:
A beach is a landform alongside a body of water which consists of loose particles. The particles composing a beach are typically made from rock, such as sand, gravel, shingle, pebbles, etc, or biological sources, such as mollusc shells or coralline algae.
Explanation:
He calls the raven a prophet, a thing of evil, and a fiend
