In a population of deer in one year, six deer were born, five deer emigrated, three deer were killed by predators, and one deer immigrated. What can be determined from this information? Population growth is decreasing.
Population growth is increasing.
Population growth stays the same.
Population reaches the carrying capacity.

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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.