I think its a density dependent limited factor
Answer:
"Carbohydrates, proteins, and fats are digested in the intestine, where they are broken down into their basic units. Carbohydrates into sugar, proteins into amino acids, and fats into fatty acids and glycerol."
"Obtain and use energy" is your answer :)
LATitude are the lines that go around the world. They are like a LATter.
Longitude go from the north pole to the south pole.