Which of the following statements about positive feedback mechanisms is not true?
a.
positive feedback mechanisms can result from human activity.
b.
positive feedback mechanisms can occur naturally.
c.
positive feedback mechanisms lead to increased change.
d.
positive feedback mechanisms reduce change in a system.

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

explanation:

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.