Under the Illinois Real Estate License Act of 2000, which of the following requires the owner's written consent

Showing a home for sale typically does not require written consent, as real estate agents often have the authority to arrange viewings based on listing agreements. These agreements usually provide sufficient rights to show the property without needing additional written consent from the owner for each individual showing.

Conducting a competitive market analysis is generally considered a preliminary step in the sales process and does not require the owner's written consent. This analysis is often performed by agents to determine an appropriate listing price and can be done without explicit permission, as it does not involve altering access to the property.

While placing a "For Sale" sign is a common practice, it typically falls under the authority granted by a listing agreement between the agent and the homeowner. Thus, it does not require separate written consent unless specified in the agreement, as it is part of the marketing strategy authorized by the owner.