Question

Short note on private goods and public goods with example

Answer 1

public good is a good that is both non-excludable and non-rivalrous. ... Examples of public goods include fresh air, knowledge, lighthouses, national defense, flood control systems, and street lighting.

A private good is defined in economics as "an item that yields positive benefits to people that is excludable, i.e. its owners can exercise private property rights, preventing those who have not paid for it from using the good or consuming its benefits and rivalrous, i.e. consumption by one necessarily prevents that of another.