What is a buffer stock?

Explanation

### Step-by-Step Text Solution:

1. **Definition of Buffer Stock**: A buffer stock refers to an extra reserve of food grains that is maintained by governments or organizations.

2. **Purpose of Buffer Stock**: The primary purpose of maintaining a buffer stock is to ensure food security. It acts as a safeguard against potential crop failures due to adverse weather conditions like high temperatures or excessive rainfall.

3. **Usage of Buffer Stock**: In times of crop failure or low production, the buffer stock can be utilized to meet the food demand. This helps in preventing scarcity and ensures that there is enough food available for the population.

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