Which of the following is considered a channel of distribution?

Ecommerce is considered a channel of distribution because it facilitates the movement of products from manufacturers or suppliers directly to consumers through online platforms. This modern distribution method allows businesses to reach a broader audience, streamline sales processes, and provide consumers with convenient access to goods without the need for a physical retail presence. Ecommerce serves as a vital link in the supply chain, transforming the way products are marketed and sold.

In contrast, the other choices play different roles within the supply chain but do not represent distribution channels in the same way. A manufacturer produces goods but does not inherently serve as a channel; a supplier provides the necessary components or products but is part of the supply chain rather than a distribution mechanism; and a product designer focuses on the creation and innovation of products without direct involvement in the distribution process. Thus, ecommerce stands out as a clear channel of distribution.