Final answer:
An 'Area strategy' refers to a single franchise owning multiple units within a specific territory, which ensures market penetration and operational efficiency.
Step-by-step explanation:
A franchise strategy where a single franchise owns more than one unit in a certain area is typically referred to as Area strategy. This strategy involves a franchisee purchasing the rights to open and operate multiple locations within a specified territory, thereby establishing a stronger presence in that region. It is a way for franchises to ensure market penetration and operational efficiency within the local region by creating a network of interconnected outlets.