How are informal norms different from formal norms:.
a) Informal norms are legislated by the government
b) Informal norms are implicit and unspoken
c) Informal norms are expressed in the form of written rules or policies
d) Informal norms are always followed

Option (b) is incorrect option

Explanation:

Informal laws are the regulations that are unspoken behavior norms which people can get obligated for following as per their liking.This is a casual behavior which is connected with law for following unlike formal norms that are written laws of legislation for obeying.

Other options are incorrect because informal norms are not considered as legislated by the government system, are not written rules and regulation or followed as persistently as law  by people.Thus, the correct option is option(b).

answer; /// i do believe that the correct answer is (d) cooperative play; /// good luck