Concept:A wallow is a shallow pool of water or mud provided for pigs to help regulate their body temperature.
Explanation:Pigs lack efficient sweat glands, so they cannot cool down easily by sweating.
By rolling in a wallow, pigs coat their skin with water or mud.
As the moisture evaporates, it draws heat away from the body and cools the pig.
This is especially useful in hot weather or tropical climates.
A wallow is not meant to reduce feed intake, increase water intake, or serve as a swimming pool.
Answer:D. cool the temperature of pigs