Which of the following must a landlord provide when a tenant requests repairs?

A landlord is legally required to provide a response and take timely action to maintain habitability standards when a tenant requests repairs. This obligation stems from the landlord's responsibility to ensure that the rental property remains safe and livable. Habitability standards are guidelines that include essential services such as heat, water, electricity, and repairs necessary to keep the premises in a condition fit for human habitation.

When tenants report issues or request repairs, landlords must address these concerns promptly to comply with both state laws and the terms of the lease agreement. Failing to do so not only risks deteriorating the condition of the property but could also lead to legal consequences or potential claims from the tenant. By fulfilling this obligation, landlords help ensure a positive and lawful rental experience for both parties.

The other options do not reflect the landlord's legal responsibilities. A written note denying the request does not meet the requirement for action, a guarantee of immediate repair is not realistic or required, and having no obligation fails to align with the legal standard for maintaining the property. Therefore, the necessity to respond and act accordingly to keep the property habitable stands as the appropriate requirement.