Step 1: Understanding the Concept:
In Yoga, food is categorized into three types: Sattvic, Rajasic, and Tamasic.
Step 2: Detailed Explanation:
- Tamasic Diet: Includes stale, over-processed, chemically treated, or non-vegetarian food. It creates dullness, laziness (Alasya), and negative mental states like depression.
- Sattvic Diet: Includes fresh, pure, and light foods. This diet is responsible for the expansion of life span, well-being, and clarity of mind.
Therefore, option (C) is a feature of a Sattvic diet, not a Tamasic one.
Step 3: Final Answer:
Expansion of life span and well-being is not a feature of a Tamasic diet.