Which of the following is a common by-product of farm animals?
A.
All of the above
B.
Wool
C.
Fertilizer
D.
Milk
Correct answer is A
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.
