Final answer:
The direct organizational strategy being referred to is known as market penetration, which involves increasing sales of existing products within current market segments. This is distinct from vertical and horizontal integration, which relate to supply chain control and merger activities, respectively, and from diversification, which involves entering new markets or product lines.
Step-by-step explanation:
The direct organizational strategy referred to in the question is known as market penetration. Market penetration is an approach used by companies to grow their business by increasing sales of existing products to the current market segments without changing the product itself. Although the question asks about a direct organizational strategy, the list provided seems to confuse different concepts. Vertical integration refers to a company's expansion by taking control of more than one stage of its supply chain, such as a producer also acquiring its supplier or distributor. Horizontal integration, on the other hand, occurs when a firm merges with or acquires another company that produces the same kind of product to become more efficient or eliminate competition. Diversification is when a company develops new products or enters new markets. Therefore, among the given options, market penetration is not directly related to the concept of integration or diversification strategies.