Answer: crowdsourcing business model.

**Explanation:** - **Option A (Incorrect):** A platform business model is based on a network and differs from traditional linear businesses by facilitating interactions between users rather than adding value in a linear supply chain. However, it is not specifically designed to allow users to contribute directly to products, services, or online content. - **Option B (Incorrect):** A marketplace business model connects buyers and sellers without owning the goods involved. Examples include Alibaba and eBay. Like platform models, marketplace models are not tailored for direct user contributions to content or products. - **Option C (Correct):** A crowdsourcing business model is designed to enable users to contribute directly to products, services, or online content. Examples include Wikipedia (knowledge aggregation), open-source software development, and platforms like Waze. This aligns perfectly with the scenario described in the question.

Author: LeetQuiz Editorial Team