Enzymes in saliva begin the chemical digestion of fats carbohydrates protein. vitamins

the glands which are associated with each description is given below:

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.

i think it is d. objects resist changes in their state of motion.