When can
exponential growth occur in a population?

c

Explanation:

Exponential growth is when a population increases in a given time when resources are unlimited. In regular nature, resources will eventually run out, but if they are unlimited, they can grow exponentially

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.

to this answer it would be edge enhancement