Final answer:
A sponsoring broker is required to provide written disclosures to their agents for clients, which are legally mandated to ensure informed decision-making by clients.
Step-by-step explanation:
A sponsoring broker must provide written disclosures for his/her agents to give to clients. These disclosures ensure that clients are fully informed about the terms of their transactions, agency relationships, and any material facts that could affect their decisions. While marketing signs and newsletter templates can be beneficial and may be supplied by a broker, they are not typically required by law or regulations like written disclosures are.