Final answer:
The film 'Food Inc.' depicts US supermarkets as providing an illusion of diversity because they offer a limited range of industrialized products that seem varied but are not locally sourced or diverse in their true production origins.
Step-by-step explanation:
The film Food Inc. refers to supermarkets in the US as an illusion of diversity because supermarkets create an illusion of choice while relying on a limited set of industrialized food products. Although the aisles seem to host a vast array of items, in reality, the products come from a narrow base of manufacturers and are often shipped long distances before reaching store shelves. This contrasts starkly with truly diverse, local, and sustainably-sourced food options, which are less common in mainstream supermarkets. The food system as depicted in the film is highly industrialized, favoring efficiency, calculability, predictability, and control. This has resulted in a standardized set of goods that appear diverse but are largely similar in their origin and production methods.