Which enables an organization access to a raw material source?

Insourcing refers to the process of assigning a project or task to workers within the organization rather than outsourcing it to an external entity. While it can enhance control over operations, it does not specifically relate to gaining access to raw material sources, as it focuses more on internal resource utilization.

Outsourcing involves contracting out business processes or functions to third-party providers. This approach often leads to increased reliance on external suppliers for raw materials, which can limit an organization's control over its supply chain and does not facilitate direct access to raw material sources.

Horizontal integration entails a company acquiring or merging with other companies at the same stage of production or in similar industries to increase market share. While it can enhance competitive advantage, it does not provide access to raw materials, as it focuses on expanding market presence rather than securing supply sources.