Which of the following is a common by-product of farm animals?
-
All of the above
- Wool
- Fertilizer
- Milk
The correct answer is: A
Explanation
Farm animals often produce various valuable by-products. Milk is a common by-product of dairy animals such as cows, goats, and sheep. It is a significant source of nutrition for humans and is used to produce dairy products such as cheese, butter, and yogurt. Fertilizer is another by-product that can be obtained from farm animals, specifically from their manure.