Define duties with appropriate example

The binding or obligatory force of something that is morally or legally right; moral or legal obligation. an action or task required by a person's position or occupation; function: the duties of a clergyman. ... a task or chore that a person is expected to perform: It's your duty to do the dishes.

answer; ///the declaration of independence;

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.