Final answer:
The missing environmental force in the listed six environmental forces of business is legal, which plays a crucial role by setting the framework in which businesses operate.
Step-by-step explanation:
The six environmental forces that shape the landscape of business include political, economic, technological, sociocultural, competitive, and legal forces. These forces are dynamic and can influence each other. For example, technological advancements can lead to new laws and regulations, while changes in economic conditions can affect sociocultural trends and the competitive environment. Legal forces are particularly important as they can dictate the operational, financial, and ethical parameters within which businesses must operate.