Which statement explains how determining the age of the remains of living things is similar to dating rocks? Organisms and rocks both contain stable and unstable elements.
O Organisms contain the same unstable elements as those found in rocks.
O Elements in rocks decay at the same rate as elements in the remains of organisms.
Rocks and organisms both have gases trapped inside that are measured to determine age.

trachea, alveoli, lung capillaries, arteries

the question isn't complete here so i can't right an answer '_'

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.