What is positive externality?
a. a way to generate trade that will benefit people who are from other countries
b. an economic side effect that generates unexpected benefits
c. a cash flow that will benefit both the government and the business who interact with it
d. an extra payment to welfare recipients
-- answer fast--

a

explanation:

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.