Yabine is studying energy from food in her nutrition class. she learns that fats, proteins, and carbohydrates can store different amounts of energy because they have different chemical

She learns that fats,proteins and carbohydrates can store different amount of energy because they have different chemical structure or construction.

Explanation:

Carbohydrate,protein and fat differ in their chemical structure.

   Carbohydrates are the polyhydroxy aldehydes or polyhydroxy ketones.Proteins are the polymer of amino acids joined by peptide linkage whereas fats are the monomer of fatty acid.

   Monosaccharide,amino acids and fatty acid differ in their chemical and biochemical structure and also contain different number of carbon atoms.

  That"s why carbohydrate,protein and fat can store different amount of energy.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.