Question

which is a complete sentence? steven being such a big help around the house. electric eels stun prey with an intense electrical charge.

Explanation:

A complete sentence has a subject and a predicate. "Steven being such a big help around the house" is a phrase as it lacks a proper verb form for the subject. "Electric eels stun prey with an intense electrical charge" has a subject "electric eels" and a predicate "stun prey with an intense electrical charge".

Answer:

"Electric eels stun prey with an intense electrical charge."