Fungi are ecologically important for all of the following EXCEPT:
a. are used as food by a variety of animals (including humans)
b. recycling of chemicals between the biological and physical worlds
c. atmospheric oxygen is a major by-product of fungal phototrophy
d. sources of toxic chemicals, including antibiotics
e. mycorrhizal association with vascular plants

sources of toxic chemicals, including antibiotics

Explanation:

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction

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.