Answer:
Milk is the example of commodity.
Explanation:
We have to choose the example of commodity.
Commodity is a raw material or the primary agricultural product that can be purchased and sold, such as grain, oil or coffee.
From the given options milk, house, sweater or automobile, milk is only the raw material or the agricultural product which can be bought and sold.
Hence, milk is the example of commodity.
Option 1 is correct.