A food ___ is often nutritionally inferior.

The correct choice is indeed 'B. Imitation' because imitation foods are products designed to replicate the taste, appearance, or texture of more nutrient-dense foods but typically do not provide the same nutritional benefits. For example, an imitation cheese may use artificial ingredients and lack the essential nutrients like calcium and protein found in real cheese.

In contrast, substitutes are usually intended to replace a food item with a similar alternative, which may not necessarily be inferior nutritionally; some substitutes can even enhance nutritional value. Natural foods are generally whole or minimally processed foods that retain their original nutrients, and organic refers to how food is produced, focusing on sustainable practices rather than directly indicating nutritional quality. Thus, the term 'imitation' specifically highlights a pattern of less nutritional value compared to the food it mimics.