Explanation:

- Option 1: Food

- This involves systems dealing with a variety of consumables that are not specific to a single type of product like milk.

- Includes grains, processed foods, and can encompass a wide range of consumables.

- Option 2: Milk

- This refers to the system of cooperative efforts focused specifically on dairy production and distribution.

- Operation Flood, launched by India, is the world's largest dairy development program.

- It transformed the dairy industry and made India one of the largest producers of milk.

- Correct Answer

- Option 3: Agricultural product

- Refers to a broader category including all farm-produced goods like grains, fruits, and vegetables.

- It's not specific to the dairy sector.

- Option 4: None of these

- Indicates none of the given options apply, which is incorrect as the system is related to milk.