Id: 3360832553 password wZE2XQ previous id is wrong this is right sorry for tye mistake

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic

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.

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.