Which of the following tasks requires a real estate license?

Hosting an open house requires a real estate license because it involves actively promoting a property for sale on behalf of a seller. This task includes representing the seller, showcasing the property to potential buyers, and facilitating discussions about the sale, all of which fall under the duties and responsibilities that licensed real estate professionals are authorized to carry out.

In contrast, assembling closing documents and calculating a commission check do not necessitate a real estate license when performed by an administrative staff member, as these tasks can be accomplished by individuals without a license as long as they're working under the supervision of a licensed agent. While managing a listing might seem similar, it traditionally implies the ongoing responsibilities of a licensed agent in managing seller-client relationships, particularly in negotiations and contract oversight, rather than just the act of hosting an open event. Thus, engaging in activities that directly involve the public and contribute directly to the sale of a property, like hosting an open house, is specifically designated for licensed professionals.