Which action is an example of the promotion element?

Signing a new supplier pertains more to procurement and supply chain management rather than promotion. While securing new suppliers can enhance product availability or quality, it does not directly involve promoting the product or brand to the consumer. Thus, it does not fit within the promotional activities.

While hosting a charity gala can have promotional aspects, it primarily serves as a community engagement or corporate social responsibility initiative. This action may enhance brand reputation and visibility, but it is not a conventional promotional activity aimed at driving sales or directly marketing a product.

Increasing retail space relates to operational and strategic business decisions that aim to improve product availability or customer experience. Although this can indirectly support promotional efforts by making products more accessible, it does not constitute a direct promotional action.