What type of informational material is used to answer questions and promote exploration in retail?

The correct choice is signs, as they serve as a vital source of information in retail settings by providing clear and immediate answers to customer inquiries. Signs can include directional cues, product information, promotions, or safety instructions, all designed to engage customers and enhance their shopping experience. They help in navigating the retail space, directing attention to certain products, and creating an informative environment that encourages exploration of the store's offerings.

While brochures, labels, and flyers may also provide information, they typically serve different purposes or contexts. Brochures tend to be more detailed and are often used for comprehensive marketing or educational materials. Labels provide specific information about individual products, such as ingredients or care instructions, but they do not promote exploration as broadly as signs do. Flyers are often used for promotions or events and may not be as readily visible or accessible during the shopping experience. Hence, signs effectively fulfill the dual roles of answering questions and promoting exploration in a retail space.