What type of corporate strategy involves expanding an organization's domain into supply channels and distributors?

The correct answer is vertical integration. This strategy involves a company expanding its operations either backward into supply channels (also known as upstream) or forward into distribution (downstream). By implementing vertical integration, a business secures its supply chain by controlling the resources, process, and distribution channels, which can lead to increased efficiency, reduced costs, and heightened competitive advantage.

In contrast, horizontal integration focuses on acquiring or merging with competitors to increase market share, rather than expanding into supply and distribution channels. Market penetration, on the other hand, concentrates on increasing the market share of existing products in current markets, without altering the supply chain structure. Product diversification refers to expanding the range of products offered by a business, rather than changing its relationship with suppliers and distributors. Thus, vertical integration is the strategy that best fits the description of expanding into supply channels and distributors.